Re: [RFC v3 PATCH 1/4] xfs: Remove incore use of XFS_OQUOTA_ENFD and XFS_OQUOTA_CHKD

Ben Myers
2012-02-11T00:41:10Z

On Mon, Jan 23, 2012 at 11:32:04AM -0600, Chandra Seetharaman wrote:
> Define new macros XFS_GQUOTA_ENFD, XFS_GQUOTA_CHKD, XFS_PQUOTA_ENFD, and
> XFS_PQUOTA_CHKD.
>
> Remove incore use of XFS_OQUOTA_ENFD and XFS_OQUOTA_CHKD. Instead,
> start using XFS_GQUOTA_.* XFS_PQUOTA_.* counterparts.
>
> No changes is made to the on-disk version of the superblock yet. On-disk
> copy still uses XFS_OQUOTA_ENFD and XFS_OQUOTA_CHKD.
>
> Signed-off-by: Chandra Seetharaman <sekharan@us.ibm.com>
> ---
> fs/xfs/xfs_mount.c | 30 ++++++++++++++++++++++++++++++
> fs/xfs/xfs_qm.c | 9 ++++++---
> fs/xfs/xfs_qm_syscalls.c | 26 ++++++++++++++------------
> fs/xfs/xfs_quota.h | 36 +++++++++++++++++++++++++-----------
> fs/xfs/xfs_quotaops.c | 6 ++++--
> fs/xfs/xfs_super.c | 16 ++++++++--------
> fs/xfs/xfs_trans_dquot.c | 4 ++--
> 7 files changed, 89 insertions(+), 38 deletions(-)
>
> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
> index b50ec5b..d7205b0 100644
> --- a/fs/xfs/xfs_quota.h
> +++ b/fs/xfs/xfs_quota.h
> @@ -152,19 +152,34 @@ typedef struct xfs_qoff_logformat {
> #define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
>
> /*
> + * Start differentiating group quota and project quota in-core
> + * using distinct flags, instead of using the combined OQUOTA flags.
> + *
> + * Conversion to and from the combined OQUOTA flag (if necessary)
> + * is done only in xfs_sb_{to,from}_disk()
> + */
> +#define XFS_GQUOTA_ENFD 0x0080 /* group quota limits enforced */
> +#define XFS_GQUOTA_CHKD 0x0100 /* quotacheck run on group quotas */
> +#define XFS_PQUOTA_ENFD 0x0200 /* project quota limits enforced */
> +#define XFS_PQUOTA_CHKD 0x0400 /* quotacheck run on project quotas */
> +
> +/*
> * Quota Accounting/Enforcement flags
> */
> #define XFS_ALL_QUOTA_ACCT \
> (XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
> -#define XFS_ALL_QUOTA_ENFD (XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD)
> -#define XFS_ALL_QUOTA_CHKD (XFS_UQUOTA_CHKD | XFS_OQUOTA_CHKD)
> +#define XFS_ALL_QUOTA_ENFD \
> + (XFS_UQUOTA_ENFD | XFS_GQUOTA_ENFD | XFS_PQUOTA_ENFD)
> +#define XFS_ALL_QUOTA_CHKD \
> + (XFS_UQUOTA_CHKD | XFS_GQUOTA_CHKD | XFS_PQUOTA_CHKD)
>
> #define XFS_IS_QUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
> #define XFS_IS_UQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_UQUOTA_ACCT)
> #define XFS_IS_PQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_PQUOTA_ACCT)
> #define XFS_IS_GQUOTA_RUNNING(mp) ((mp)->m_qflags & XFS_GQUOTA_ACCT)
> #define XFS_IS_UQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_UQUOTA_ENFD)
> -#define XFS_IS_OQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_OQUOTA_ENFD)
> +#define XFS_IS_PQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_PQUOTA_ENFD)
> +#define XFS_IS_GQUOTA_ENFORCED(mp) ((mp)->m_qflags & XFS_GQUOTA_ENFD)
>
> /*
> * Incore only flags for quotaoff - these bits get cleared when quota(s)
> @@ -259,24 +274,23 @@ typedef struct xfs_qoff_logformat {
> ((XFS_IS_UQUOTA_ON(mp) && \
> (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
> (XFS_IS_GQUOTA_ON(mp) && \
> - ((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 || \
> - (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT))) || \
> + (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
> (XFS_IS_PQUOTA_ON(mp) && \
> - ((mp->m_sb.sb_qflags & XFS_OQUOTA_CHKD) == 0 || \
> - (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT))))
> + (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
>
> #define XFS_MOUNT_QUOTA_SET1 (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
> XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
> - XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)
> + XFS_PQUOTA_ENFD|XFS_PQUOTA_CHKD)
>
> #define XFS_MOUNT_QUOTA_SET2 (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
> XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
> - XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD)
> + XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD)
>
> #define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
> XFS_UQUOTA_CHKD|XFS_PQUOTA_ACCT|\
> - XFS_OQUOTA_ENFD|XFS_OQUOTA_CHKD|\
> - XFS_GQUOTA_ACCT)
> + XFS_PQUOTA_ENFD|XFS_PQUOTA_CHKD|\
> + XFS_GQUOTA_ACCT|XFS_GQUOTA_ENFD|\
> + XFS_GQUOTA_CHKD)
>
>
> /*
> diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
> index 25e9908..64313e4 100644
> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -593,6 +593,20 @@ xfs_sb_from_disk(
> to->sb_uquotino = be64_to_cpu(from->sb_uquotino);
> to->sb_gquotino = be64_to_cpu(from->sb_gquotino);
> to->sb_qflags = be16_to_cpu(from->sb_qflags);
> + if ((to->sb_qflags & (XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD)) &&
> + (to->sb_qflags & (XFS_PQUOTA_ENFD |XFS_GQUOTA_ENFD |
> + XFS_PQUOTA_CHKD| XFS_GQUOTA_CHKD))) {
> + xfs_notice(mp, "Super block has XFS_OQUOTA bits along with "
> + "XFS_PQUOTA and/or XFS_GQUOTA bits. Fixing it.\n");
> + }
> + if (to->sb_qflags & XFS_OQUOTA_ENFD)
> + to->sb_qflags |= (to->sb_qflags & XFS_PQUOTA_ACCT) ?
> + XFS_PQUOTA_ENFD : XFS_GQUOTA_ENFD;
> + if (to->sb_qflags & XFS_OQUOTA_CHKD)
> + to->sb_qflags |= (to->sb_qflags & XFS_PQUOTA_ACCT) ?
> + XFS_PQUOTA_CHKD : XFS_GQUOTA_CHKD;
> + to->sb_qflags &= ~(XFS_OQUOTA_ENFD | XFS_OQUOTA_CHKD);
> +
> to->sb_flags = from->sb_flags;
> to->sb_shared_vn = from->sb_shared_vn;
> to->sb_inoalignmt = be32_to_cpu(from->sb_inoalignmt);
> @@ -622,11 +636,26 @@ xfs_sb_to_disk(
> xfs_sb_field_t f;
> int first;
> int size;
> + __be16 saved_qflags;
>
> ASSERT(fields);
> if (!fields)
> return;
>
> + /*
> + * in-core version of qflags do not have XFS_OQUOTA.*, whereas the
> + * on-disk version does. So, save the in-core sb_qflags and restore
> + * it after we modify and copy it to the buffer to be copied to
> + * disk.
> + */
> + saved_qflags = from->sb_qflags;
> +
> + if (from->sb_qflags & (XFS_PQUOTA_ENFD | XFS_GQUOTA_ENFD))
> + from->sb_qflags |= XFS_OQUOTA_ENFD;
> + if (from->sb_qflags & (XFS_PQUOTA_CHKD | XFS_GQUOTA_CHKD))
> + from->sb_qflags |= XFS_OQUOTA_CHKD;
> + from->sb_qflags &= ~(XFS_PQUOTA_ENFD | XFS_PQUOTA_CHKD |
> + XFS_GQUOTA_ENFD | XFS_GQUOTA_CHKD);
> while (fields) {
> f = (xfs_sb_field_t)xfs_lowbit64((__uint64_t)fields);
> first = xfs_sb_info[f].offset;
> @@ -657,6 +686,7 @@ xfs_sb_to_disk(
>
> fields &= ~(1LL << f);
> }
> + from->sb_qflags = saved_qflags;

I am disgusted that you should have to save the sb_qflags like this.
After reading this 'fields' loop in xfs_sb_to_disk along with all the
related crap I am actually feeling a little nauseous.

I don't know why in XFS we seem to feel the need to do everything in the
most complicated way possible.

The rest of the patch looks good.

Reviewed-by: Ben Myers <bpm@sgi.com>

> }
>
> /*
> diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
> index 1b2f5b3..bb8c2ac 100644
> --- a/fs/xfs/xfs_qm.c
> +++ b/fs/xfs/xfs_qm.c
> @@ -313,8 +313,10 @@ xfs_qm_mount_quotas(
> */
> if (!XFS_IS_UQUOTA_ON(mp))
> mp->m_qflags &= ~XFS_UQUOTA_CHKD;
> - if (!(XFS_IS_GQUOTA_ON(mp) || XFS_IS_PQUOTA_ON(mp)))
> - mp->m_qflags &= ~XFS_OQUOTA_CHKD;
> + if (!XFS_IS_GQUOTA_ON(mp))
> + mp->m_qflags &= ~XFS_GQUOTA_CHKD;
> + if (!XFS_IS_PQUOTA_ON(mp))
> + mp->m_qflags &= ~XFS_PQUOTA_CHKD;
>
> write_changes:
> /*
> @@ -1449,7 +1451,8 @@ xfs_qm_quotacheck(
> XFS_QMOPT_GQUOTA : XFS_QMOPT_PQUOTA);
> if (error)
> goto error_return;
> - flags |= XFS_OQUOTA_CHKD;
> + flags |= XFS_IS_GQUOTA_ON(mp) ?
> + XFS_GQUOTA_CHKD : XFS_PQUOTA_CHKD;
> }
>
> do {
> diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
> index eafbcff..d43c68c 100644
> --- a/fs/xfs/xfs_qm_syscalls.c
> +++ b/fs/xfs/xfs_qm_syscalls.c
> @@ -121,11 +121,11 @@ xfs_qm_scall_quotaoff(
> }
> if (flags & XFS_GQUOTA_ACCT) {
> dqtype |= XFS_QMOPT_GQUOTA;
> - flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
> + flags |= (XFS_GQUOTA_CHKD | XFS_GQUOTA_ENFD);
> inactivate_flags |= XFS_GQUOTA_ACTIVE;
> } else if (flags & XFS_PQUOTA_ACCT) {
> dqtype |= XFS_QMOPT_PQUOTA;
> - flags |= (XFS_OQUOTA_CHKD | XFS_OQUOTA_ENFD);
> + flags |= (XFS_PQUOTA_CHKD | XFS_PQUOTA_ENFD);
> inactivate_flags |= XFS_PQUOTA_ACTIVE;
> }
>
> @@ -349,9 +349,11 @@ xfs_qm_scall_quotaon(
> ||
> ((flags & XFS_PQUOTA_ACCT) == 0 &&
> (mp->m_sb.sb_qflags & XFS_PQUOTA_ACCT) == 0 &&
> - (flags & XFS_GQUOTA_ACCT) == 0 &&
> + (flags & XFS_PQUOTA_ENFD))
> + ||
> + ((flags & XFS_GQUOTA_ACCT) == 0 &&
> (mp->m_sb.sb_qflags & XFS_GQUOTA_ACCT) == 0 &&
> - (flags & XFS_OQUOTA_ENFD))) {
> + (flags & XFS_GQUOTA_ENFD))) {
> xfs_debug(mp,
> "%s: Can't enforce without acct, flags=%x sbflags=%x\n",
> __func__, flags, mp->m_sb.sb_qflags);
> @@ -801,8 +803,8 @@ xfs_qm_export_dquot(
> * so return zeroes in that case.
> */
> if ((!XFS_IS_UQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_USER) ||
> - (!XFS_IS_OQUOTA_ENFORCED(mp) &&
> - (src->d_flags & (XFS_DQ_PROJ | XFS_DQ_GROUP)))) {
> + (!XFS_IS_PQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_PROJ) ||
> + (!XFS_IS_GQUOTA_ENFORCED(mp) && src->d_flags == XFS_DQ_GROUP)) {
> dst->d_btimer = 0;
> dst->d_itimer = 0;
> dst->d_rtbtimer = 0;
> @@ -810,8 +812,8 @@ xfs_qm_export_dquot(
>
> #ifdef DEBUG
> if (((XFS_IS_UQUOTA_ENFORCED(mp) && dst->d_flags == FS_USER_QUOTA) ||
> - (XFS_IS_OQUOTA_ENFORCED(mp) &&
> - (dst->d_flags & (FS_PROJ_QUOTA | FS_GROUP_QUOTA)))) &&
> + (XFS_IS_PQUOTA_ENFORCED(mp) && dst->d_flags == FS_PROJ_QUOTA) ||
> + (XFS_IS_GQUOTA_ENFORCED(mp) && dst->d_flags == FS_GROUP_QUOTA)) &&
> dst->d_id != 0) {
> if (((int) dst->d_bcount >= (int) dst->d_blk_softlimit) &&
> (dst->d_blk_softlimit > 0)) {
> @@ -860,10 +862,10 @@ xfs_qm_export_flags(
> uflags |= FS_QUOTA_GDQ_ACCT;
> if (flags & XFS_UQUOTA_ENFD)
> uflags |= FS_QUOTA_UDQ_ENFD;
> - if (flags & (XFS_OQUOTA_ENFD)) {
> - uflags |= (flags & XFS_GQUOTA_ACCT) ?
> - FS_QUOTA_GDQ_ENFD : FS_QUOTA_PDQ_ENFD;
> - }
> + if (flags & XFS_PQUOTA_ENFD)
> + uflags |= FS_QUOTA_PDQ_ENFD;
> + if (flags & XFS_GQUOTA_ENFD)
> + uflags |= FS_QUOTA_GDQ_ENFD;
> return (uflags);
> }
>
> diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
> index 7e76f53..be5389e 100644
> --- a/fs/xfs/xfs_quotaops.c
> +++ b/fs/xfs/xfs_quotaops.c
> @@ -76,8 +76,10 @@ xfs_fs_set_xstate(
> flags |= XFS_GQUOTA_ACCT;
> if (uflags & FS_QUOTA_UDQ_ENFD)
> flags |= XFS_UQUOTA_ENFD;
> - if (uflags & (FS_QUOTA_PDQ_ENFD|FS_QUOTA_GDQ_ENFD))
> - flags |= XFS_OQUOTA_ENFD;
> + if (uflags & FS_QUOTA_PDQ_ENFD)
> + flags |= XFS_PQUOTA_ENFD;
> + if (uflags & FS_QUOTA_GDQ_ENFD)
> + flags |= XFS_GQUOTA_ENFD;
>
> switch (op) {
> case Q_XQUOTAON:
> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
> index 5e0d43f..01de9f9 100644
> --- a/fs/xfs/xfs_super.c
> +++ b/fs/xfs/xfs_super.c
> @@ -339,17 +339,17 @@ xfs_parseargs(
> } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
> !strcmp(this_char, MNTOPT_PRJQUOTA)) {
> mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
> - XFS_OQUOTA_ENFD);
> + XFS_PQUOTA_ENFD);
> } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
> mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
> - mp->m_qflags &= ~XFS_OQUOTA_ENFD;
> + mp->m_qflags &= ~XFS_PQUOTA_ENFD;
> } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
> !strcmp(this_char, MNTOPT_GRPQUOTA)) {
> mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
> - XFS_OQUOTA_ENFD);
> + XFS_GQUOTA_ENFD);
> } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
> mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
> - mp->m_qflags &= ~XFS_OQUOTA_ENFD;
> + mp->m_qflags &= ~XFS_GQUOTA_ENFD;
> } else if (!strcmp(this_char, MNTOPT_DELAYLOG)) {
> xfs_warn(mp,
> "delaylog is the default now, option is deprecated.");
> @@ -542,12 +542,12 @@ xfs_showargs(
> /* Either project or group quotas can be active, not both */
>
> if (mp->m_qflags & XFS_PQUOTA_ACCT) {
> - if (mp->m_qflags & XFS_OQUOTA_ENFD)
> + if (mp->m_qflags & XFS_PQUOTA_ENFD)
> seq_puts(m, "," MNTOPT_PRJQUOTA);
> else
> seq_puts(m, "," MNTOPT_PQUOTANOENF);
> } else if (mp->m_qflags & XFS_GQUOTA_ACCT) {
> - if (mp->m_qflags & XFS_OQUOTA_ENFD)
> + if (mp->m_qflags & XFS_GQUOTA_ENFD)
> seq_puts(m, "," MNTOPT_GRPQUOTA);
> else
> seq_puts(m, "," MNTOPT_GQUOTANOENF);
> @@ -1059,8 +1059,8 @@ xfs_fs_statfs(
> spin_unlock(&mp->m_sb_lock);
>
> if ((ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
> - ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
> - (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
> + ((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))) ==
> + (XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD))
> xfs_qm_statvfs(ip, statp);
> return 0;
> }
> diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
> index 4d00ee6..bea957d 100644
> --- a/fs/xfs/xfs_trans_dquot.c
> +++ b/fs/xfs/xfs_trans_dquot.c
> @@ -640,8 +640,8 @@ xfs_trans_dqresv(
> if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
> dqp->q_core.d_id &&
> ((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
> - (XFS_IS_OQUOTA_ENFORCED(dqp->q_mount) &&
> - (XFS_QM_ISPDQ(dqp) || XFS_QM_ISGDQ(dqp))))) {
> + (XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)) ||
> + (XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)))) {
> if (nblks > 0) {
> /*
> * dquot is locked already. See if we'd go over the
> --
> 1.7.1
>
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