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[RFC v2 PATCH 1/5] xfs: Prep work for supporting both pquota and gquota.

To: xfs@xxxxxxxxxxx
Subject: [RFC v2 PATCH 1/5] xfs: Prep work for supporting both pquota and gquota.
From: Chandra Seetharaman <sekharan@xxxxxxxxxx>
Date: Wed, 26 Oct 2011 16:21:58 -0500
Cc: Chandra Seetharaman <sekharan@xxxxxxxxxx>
In-reply-to: <20111026212150.6513.38058.sendpatchset@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
References: <20111026212150.6513.38058.sendpatchset@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Define few macros, inline functions, and change interface in
preparation for allowing pquota and gquota to be used together.

Signed-off-by: Chandra Seetharaman <sekharan@xxxxxxxxxx>
---
 fs/xfs/xfs_dquot.c       |   37 +++++++++++--------------------------
 fs/xfs/xfs_dquot.h       |   15 ++++++++++++---
 fs/xfs/xfs_log_recover.c |    2 +-
 fs/xfs/xfs_mount.c       |    6 ++++--
 fs/xfs/xfs_mount.h       |    2 +-
 fs/xfs/xfs_qm.c          |    2 +-
 fs/xfs/xfs_quota.h       |    2 ++
 fs/xfs/xfs_super.c       |    7 +++----
 8 files changed, 35 insertions(+), 38 deletions(-)

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 25d7280..1952999 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -372,7 +372,7 @@ xfs_qm_dqalloc(
         * Return if this type of quotas is turned off while we didn't
         * have an inode lock
         */
-       if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
+       if (!XFS_IS_TYPE_QUOTA_ON(dqp->q_mount, dqp->dq_flags)) {
                xfs_iunlock(quotip, XFS_ILOCK_EXCL);
                return (ESRCH);
        }
@@ -474,7 +474,7 @@ xfs_qm_dqtobp(
        dqp->q_fileoffset = (xfs_fileoff_t)id / mp->m_quotainfo->qi_dqperchunk;
 
        xfs_ilock(quotip, XFS_ILOCK_SHARED);
-       if (XFS_IS_THIS_QUOTA_OFF(dqp)) {
+       if (!XFS_IS_TYPE_QUOTA_ON(dqp->q_mount, dqp->dq_flags)) {
                /*
                 * Return if this type of quotas is turned off while we
                 * didn't have the quota inode lock.
@@ -808,7 +808,7 @@ xfs_qm_dqget(
        uint            flags,    /* DQALLOC, DQSUSER, DQREPAIR, DOWARN */
        xfs_dquot_t     **O_dqpp) /* OUT : locked incore dquot */
 {
-       xfs_dquot_t     *dqp;
+       xfs_dquot_t     *dqp, *dqp1;
        xfs_dqhash_t    *h;
        uint            version;
        int             error;
@@ -839,10 +839,7 @@ xfs_qm_dqget(
               type == XFS_DQ_GROUP);
        if (ip) {
                ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-               if (type == XFS_DQ_USER)
-                       ASSERT(ip->i_udquot == NULL);
-               else
-                       ASSERT(ip->i_gdquot == NULL);
+               ASSERT(xfs_inode_dquot(ip, type) == NULL);
        }
 #endif
        mutex_lock(&h->qh_lock);
@@ -921,30 +918,18 @@ xfs_qm_dqget(
                 * A dquot could be attached to this inode by now, since
                 * we had dropped the ilock.
                 */
-               if (type == XFS_DQ_USER) {
-                       if (!XFS_IS_UQUOTA_ON(mp)) {
-                               /* inode stays locked on return */
-                               xfs_qm_dqdestroy(dqp);
-                               return XFS_ERROR(ESRCH);
-                       }
-                       if (ip->i_udquot) {
+               if (XFS_IS_TYPE_QUOTA_ON(mp, type)) {
+                       dqp1 = xfs_inode_dquot(ip, type);
+                       if (dqp1) {
                                xfs_qm_dqdestroy(dqp);
-                               dqp = ip->i_udquot;
+                               dqp = dqp1;
                                xfs_dqlock(dqp);
                                goto dqret;
                        }
                } else {
-                       if (!XFS_IS_OQUOTA_ON(mp)) {
-                               /* inode stays locked on return */
-                               xfs_qm_dqdestroy(dqp);
-                               return XFS_ERROR(ESRCH);
-                       }
-                       if (ip->i_gdquot) {
-                               xfs_qm_dqdestroy(dqp);
-                               dqp = ip->i_gdquot;
-                               xfs_dqlock(dqp);
-                               goto dqret;
-                       }
+                       /* inode stays locked on return */
+                       xfs_qm_dqdestroy(dqp);
+                       return XFS_ERROR(ESRCH);
                }
        }
 
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 34b7e94..4467fd1 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -102,6 +102,14 @@ static inline void xfs_dqfunlock(xfs_dquot_t *dqp)
        complete(&dqp->q_flush);
 }
 
+static inline xfs_dquot_t *xfs_inode_dquot(xfs_inode_t *ip, int type)
+{
+       if (type == XFS_DQ_USER)
+               return ip->i_udquot;
+       else 
+               return ip->i_gdquot;
+}
+       
 #define XFS_DQ_IS_LOCKED(dqp)  (mutex_is_locked(&((dqp)->q_qlock)))
 #define XFS_DQ_IS_DIRTY(dqp)   ((dqp)->dq_flags & XFS_DQ_DIRTY)
 #define XFS_QM_ISUDQ(dqp)      ((dqp)->dq_flags & XFS_DQ_USER)
@@ -112,9 +120,10 @@ static inline void xfs_dqfunlock(xfs_dquot_t *dqp)
                                 XFS_DQ_TO_QINF(dqp)->qi_uquotaip : \
                                 XFS_DQ_TO_QINF(dqp)->qi_gquotaip)
 
-#define XFS_IS_THIS_QUOTA_OFF(d) (! (XFS_QM_ISUDQ(d) ? \
-                                    (XFS_IS_UQUOTA_ON((d)->q_mount)) : \
-                                    (XFS_IS_OQUOTA_ON((d)->q_mount))))
+#define XFS_IS_TYPE_QUOTA_ON(mp, type) \
+               ((XFS_IS_UQUOTA_ON(mp) && (type) == XFS_DQ_USER) || \
+               (XFS_IS_OQUOTA_ON(mp) && (type) == XFS_DQ_PROJ) || \
+               (XFS_IS_OQUOTA_ON(mp) && (type) == XFS_DQ_GROUP))
 
 extern void            xfs_qm_dqdestroy(xfs_dquot_t *);
 extern int             xfs_qm_dqflush(xfs_dquot_t *, uint);
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 541a508..b38eb84 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -3695,7 +3695,7 @@ xlog_do_recover(
 
        /* Convert superblock from on-disk format */
        sbp = &log->l_mp->m_sb;
-       xfs_sb_from_disk(sbp, XFS_BUF_TO_SBP(bp));
+       xfs_sb_from_disk(log->l_mp, XFS_BUF_TO_SBP(bp));
        ASSERT(sbp->sb_magicnum == XFS_SB_MAGIC);
        ASSERT(xfs_sb_good_version(sbp));
        xfs_buf_relse(bp);
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index d06afbc..19a6f40 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -553,9 +553,11 @@ out_unwind:
 
 void
 xfs_sb_from_disk(
-       xfs_sb_t        *to,
+       xfs_mount_t     *mp,
        xfs_dsb_t       *from)
 {
+       xfs_sb_t        *to = &mp->m_sb;
+
        to->sb_magicnum = be32_to_cpu(from->sb_magicnum);
        to->sb_blocksize = be32_to_cpu(from->sb_blocksize);
        to->sb_dblocks = be64_to_cpu(from->sb_dblocks);
@@ -693,7 +695,7 @@ reread:
         * Initialize the mount structure from the superblock.
         * But first do some basic consistency checking.
         */
-       xfs_sb_from_disk(&mp->m_sb, XFS_BUF_TO_SBP(bp));
+       xfs_sb_from_disk(mp, XFS_BUF_TO_SBP(bp));
        error = xfs_mount_validate_sb(mp, &(mp->m_sb), flags);
        if (error) {
                if (loud)
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index bb24dac..376a618 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -396,7 +396,7 @@ extern void xfs_set_low_space_thresholds(struct xfs_mount 
*);
 extern void    xfs_mod_sb(struct xfs_trans *, __int64_t);
 extern int     xfs_initialize_perag(struct xfs_mount *, xfs_agnumber_t,
                                        xfs_agnumber_t *);
-extern void    xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
+extern void    xfs_sb_from_disk(struct xfs_mount *, struct xfs_dsb *);
 extern void    xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
 
 #endif /* __XFS_MOUNT_H__ */
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 5cff443..508cee7 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -1688,7 +1688,7 @@ xfs_qm_quotacheck(
         * quotachecked status, since we won't be doing accounting for
         * that type anymore.
         */
-       mp->m_qflags &= ~(XFS_OQUOTA_CHKD | XFS_UQUOTA_CHKD);
+       mp->m_qflags &= ~XFS_ALL_QUOTA_CHKD;
        mp->m_qflags |= flags;
 
  error_return:
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index a595f29..16486c3 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -176,6 +176,8 @@ typedef struct xfs_qoff_logformat {
 #define XFS_UQUOTA_ACTIVE      0x0100  /* uquotas are being turned off */
 #define XFS_PQUOTA_ACTIVE      0x0200  /* pquotas are being turned off */
 #define XFS_GQUOTA_ACTIVE      0x0400  /* gquotas are being turned off */
+#define XFS_ALL_QUOTA_ACTIVE   \
+               (XFS_UQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE)
 
 /*
  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 3eca58f..5e4364a 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -325,10 +325,9 @@ xfs_parseargs(
                } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
                        mp->m_flags |= XFS_MOUNT_FILESTREAMS;
                } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
-                       mp->m_qflags &= ~(XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE |
-                                         XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE |
-                                         XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE |
-                                         XFS_UQUOTA_ENFD | XFS_OQUOTA_ENFD);
+                       mp->m_qflags &= ~XFS_ALL_QUOTA_ACCT;
+                       mp->m_qflags &= ~XFS_ALL_QUOTA_ENFD;
+                       mp->m_qflags &= ~XFS_ALL_QUOTA_ACTIVE;
                } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
                           !strcmp(this_char, MNTOPT_UQUOTA) ||
                           !strcmp(this_char, MNTOPT_USRQUOTA)) {
-- 
1.7.1

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