[XFS] remove dependency of the quota module on behaviors

Mount options are now parsed by the main XFS module and rejected if quota
support is not available, and there are some new quota operation for the
quotactl syscall and calls to quote in the mount, unmount and sync
callchains.

SGI-PV: 969608
SGI-Modid: xfs-linux-melb:xfs-kern:29503a

Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>

12 files changed, 224 insertions, 303 deletions

diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c
index 24073f8a292b..103add6eccb6 100644
--- a/fs/xfs/linux-2.6/xfs_super.c
+++ b/fs/xfs/linux-2.6/xfs_super.c
@@ -729,7 +729,7 @@ xfs_fs_quotasync(
         struct super_block      *sb,
         int                     type)
 {
-        return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL);
+        return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XQUOTASYNC, 0, NULL);
 }
 
 STATIC int
@@ -737,7 +737,7 @@ xfs_fs_getxstate(
         struct super_block      *sb,
         struct fs_quota_stat    *fqs)
 {
-        return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
+        return -XFS_QM_QUOTACTL(XFS_M(sb), Q_XGETQSTAT, 0, (caddr_t)fqs);
 }
 
 STATIC int
@@ -746,7 +746,7 @@ xfs_fs_setxstate(
         unsigned int            flags,
         int                     op)
 {
-        return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags);
+        return -XFS_QM_QUOTACTL(XFS_M(sb), op, 0, (caddr_t)&flags);
 }
 
 STATIC int
@@ -756,7 +756,7 @@ xfs_fs_getxquota(
         qid_t                   id,
         struct fs_disk_quota    *fdq)
 {
-        return -bhv_vfs_quotactl(vfs_from_sb(sb),
+        return -XFS_QM_QUOTACTL(XFS_M(sb),
                                  (type == USRQUOTA) ? Q_XGETQUOTA :
                                   ((type == GRPQUOTA) ? Q_XGETGQUOTA :
                                    Q_XGETPQUOTA), id, (caddr_t)fdq);
@@ -769,7 +769,7 @@ xfs_fs_setxquota(
         qid_t                   id,
         struct fs_disk_quota    *fdq)
 {
-        return -bhv_vfs_quotactl(vfs_from_sb(sb),
+        return -XFS_QM_QUOTACTL(XFS_M(sb),
                                  (type == USRQUOTA) ? Q_XSETQLIM :
                                   ((type == GRPQUOTA) ? Q_XSETGQLIM :
                                    Q_XSETPQLIM), id, (caddr_t)fdq);
diff --git a/fs/xfs/linux-2.6/xfs_super.h b/fs/xfs/linux-2.6/xfs_super.h
index ea2ee5a92637..4bbf985a7de7 100644
--- a/fs/xfs/linux-2.6/xfs_super.h
+++ b/fs/xfs/linux-2.6/xfs_super.h
@@ -119,4 +119,7 @@ extern void xfs_blkdev_issue_flush(struct xfs_buftarg *);
 
 extern struct export_operations xfs_export_operations;
 
+#define XFS_M(sb) \
+        XFS_VFSTOM(vfs_from_sb(sb))
+
 #endif  /* __XFS_SUPER_H__ */
diff --git a/fs/xfs/linux-2.6/xfs_vfs.c b/fs/xfs/linux-2.6/xfs_vfs.c
index 1ce15706458a..5f616ccaea8d 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.c
+++ b/fs/xfs/linux-2.6/xfs_vfs.c
@@ -155,21 +155,6 @@ vfs_vget(
         return ((*bhvtovfsops(next)->vfs_vget)(next, vpp, fidp));
 }
 
-int
-vfs_quotactl(
-        struct bhv_desc         *bdp,
-        int                     cmd,
-        int                     id,
-        caddr_t                 addr)
-{
-        struct bhv_desc         *next = bdp;
-
-        ASSERT(next);
-        while (! (bhvtovfsops(next))->vfs_quotactl)
-                next = BHV_NEXT(next);
-        return ((*bhvtovfsops(next)->vfs_quotactl)(next, cmd, id, addr));
-}
-
 void
 vfs_init_vnode(
         struct bhv_desc         *bdp,
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h
index e63dbdbfd8a0..e63b2d012f0c 100644
--- a/fs/xfs/linux-2.6/xfs_vfs.h
+++ b/fs/xfs/linux-2.6/xfs_vfs.h
@@ -127,7 +127,6 @@ typedef int	(*vfs_statvfs_t)(bhv_desc_t *, bhv_statvfs_t *,
                                 struct inode *);
 typedef int     (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
 typedef int     (*vfs_vget_t)(bhv_desc_t *, struct inode **, struct fid *);
-typedef int     (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
 typedef void    (*vfs_init_vnode_t)(bhv_desc_t *,
                                 struct inode *, struct xfs_inode *, int);
 typedef void    (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
@@ -144,7 +143,6 @@ typedef struct bhv_vfsops {
         vfs_statvfs_t           vfs_statvfs;    /* file system statistics */
         vfs_sync_t              vfs_sync;       /* flush files */
         vfs_vget_t              vfs_vget;       /* get vnode from fid */
-        vfs_quotactl_t          vfs_quotactl;   /* disk quota */
         vfs_init_vnode_t        vfs_init_vnode; /* initialize a new vnode */
         vfs_force_shutdown_t    vfs_force_shutdown;     /* crash and burn */
         vfs_freeze_t            vfs_freeze;     /* freeze fs for snapshot */
@@ -163,7 +161,6 @@ typedef struct bhv_vfsops {
 #define bhv_vfs_statvfs(v, sp,vp)       vfs_statvfs(VFSHEAD(v), sp,vp)
 #define bhv_vfs_sync(v, flag,cr)        vfs_sync(VFSHEAD(v), flag,cr)
 #define bhv_vfs_vget(v, vpp,fidp)       vfs_vget(VFSHEAD(v), vpp,fidp)
-#define bhv_vfs_quotactl(v, c,id,p)     vfs_quotactl(VFSHEAD(v), c,id,p)
 #define bhv_vfs_init_vnode(v, vp,b,ul)  vfs_init_vnode(VFSHEAD(v), vp,b,ul)
 #define bhv_vfs_force_shutdown(v,u,f,l) vfs_force_shutdown(VFSHEAD(v), u,f,l)
 #define bhv_vfs_freeze(v)               vfs_freeze(VFSHEAD(v))
@@ -180,7 +177,6 @@ typedef struct bhv_vfsops {
 #define bhv_next_vfs_statvfs(b, sp,vp)          vfs_statvfs(b, sp,vp)
 #define bhv_next_vfs_sync(b, flag,cr)           vfs_sync(b, flag,cr)
 #define bhv_next_vfs_vget(b, vpp,fidp)          vfs_vget(b, vpp,fidp)
-#define bhv_next_vfs_quotactl(b, c,id,p)        vfs_quotactl(b, c,id,p)
 #define bhv_next_vfs_init_vnode(b, vp,b2,ul)    vfs_init_vnode(b, vp,b2,ul)
 #define bhv_next_force_shutdown(b, fl,f,l)      vfs_force_shutdown(b, fl,f,l)
 #define bhv_next_vfs_freeze(b)                  vfs_freeze(b)
@@ -194,7 +190,6 @@ extern int vfs_root(bhv_desc_t *, struct inode **);
 extern int vfs_statvfs(bhv_desc_t *, bhv_statvfs_t *, struct inode *);
 extern int vfs_sync(bhv_desc_t *, int, struct cred *);
 extern int vfs_vget(bhv_desc_t *, struct inode **, struct fid *);
-extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
 extern void vfs_init_vnode(bhv_desc_t *, struct inode *, struct xfs_inode *, int);
 extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
 extern void vfs_freeze(bhv_desc_t *);
diff --git a/fs/xfs/quota/xfs_qm.c b/fs/xfs/quota/xfs_qm.c
index 9567d1846ee5..8f5a43669297 100644
--- a/fs/xfs/quota/xfs_qm.c
+++ b/fs/xfs/quota/xfs_qm.c
@@ -288,45 +288,6 @@ xfs_qm_rele_quotafs_ref(
 }
 
 /*
- * This is called at mount time from xfs_mountfs to initialize the quotainfo
- * structure and start the global quota manager (xfs_Gqm) if it hasn't done
- * so already.  Note that the superblock has not been read in yet.
- */
-void
-xfs_qm_mount_quotainit(
-        xfs_mount_t     *mp,
-        uint            flags)
-{
-        /*
-         * User, projects or group quotas has to be on.
-         */
-        ASSERT(flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA));
-
-        /*
-         * Initialize the flags in the mount structure. From this point
-         * onwards we look at m_qflags to figure out if quotas's ON/OFF, etc.
-         * Note that we enforce nothing if accounting is off.
-         * ie.  XFSMNT_*QUOTA must be ON for XFSMNT_*QUOTAENF.
-         * It isn't necessary to take the quotaoff lock to do this; this is
-         * called from mount.
-         */
-        if (flags & XFSMNT_UQUOTA) {
-                mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
-                if (flags & XFSMNT_UQUOTAENF)
-                        mp->m_qflags |= XFS_UQUOTA_ENFD;
-        }
-        if (flags & XFSMNT_GQUOTA) {
-                mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
-                if (flags & XFSMNT_GQUOTAENF)
-                        mp->m_qflags |= XFS_OQUOTA_ENFD;
-        } else if (flags & XFSMNT_PQUOTA) {
-                mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
-                if (flags & XFSMNT_PQUOTAENF)
-                        mp->m_qflags |= XFS_OQUOTA_ENFD;
-        }
-}
-
-/*
  * Just destroy the quotainfo structure.
  */
 void
@@ -1039,7 +1000,7 @@ xfs_qm_dqdetach(
 int
 xfs_qm_sync(
         xfs_mount_t     *mp,
-        short           flags)
+        int             flags)
 {
         int             recl, restarts;
         xfs_dquot_t     *dqp;
diff --git a/fs/xfs/quota/xfs_qm.h b/fs/xfs/quota/xfs_qm.h
index 689407de0a20..23ccaa5fceaf 100644
--- a/fs/xfs/quota/xfs_qm.h
+++ b/fs/xfs/quota/xfs_qm.h
@@ -166,12 +166,11 @@ typedef struct xfs_dquot_acct {
 
 extern void             xfs_qm_destroy_quotainfo(xfs_mount_t *);
 extern int              xfs_qm_mount_quotas(xfs_mount_t *, int);
-extern void             xfs_qm_mount_quotainit(xfs_mount_t *, uint);
 extern int              xfs_qm_quotacheck(xfs_mount_t *);
 extern void             xfs_qm_unmount_quotadestroy(xfs_mount_t *);
 extern int              xfs_qm_unmount_quotas(xfs_mount_t *);
 extern int              xfs_qm_write_sb_changes(xfs_mount_t *, __int64_t);
-extern int              xfs_qm_sync(xfs_mount_t *, short);
+extern int              xfs_qm_sync(xfs_mount_t *, int);
 
 /* dquot stuff */
 extern boolean_t        xfs_qm_dqalloc_incore(xfs_dquot_t **);
@@ -199,7 +198,8 @@ extern void		xfs_qm_freelist_unlink(xfs_dquot_t *);
 extern int              xfs_qm_freelist_lock_nowait(xfs_qm_t *);
 
 /* system call interface */
-extern int              xfs_qm_quotactl(bhv_desc_t *, int, int, xfs_caddr_t);
+extern int              xfs_qm_quotactl(struct xfs_mount *, int, int,
+                                xfs_caddr_t);
 
 #ifdef DEBUG
 extern int              xfs_qm_internalqcheck(xfs_mount_t *);
diff --git a/fs/xfs/quota/xfs_qm_bhv.c b/fs/xfs/quota/xfs_qm_bhv.c
index ca25ee31a02f..97bb32937585 100644
--- a/fs/xfs/quota/xfs_qm_bhv.c
+++ b/fs/xfs/quota/xfs_qm_bhv.c
@@ -48,172 +48,13 @@
 #include "xfs_buf_item.h"
 #include "xfs_qm.h"
 
-#define MNTOPT_QUOTA    "quota"         /* disk quotas (user) */
-#define MNTOPT_NOQUOTA  "noquota"       /* no quotas */
-#define MNTOPT_USRQUOTA "usrquota"      /* user quota enabled */
-#define MNTOPT_GRPQUOTA "grpquota"      /* group quota enabled */
-#define MNTOPT_PRJQUOTA "prjquota"      /* project quota enabled */
-#define MNTOPT_UQUOTA   "uquota"        /* user quota (IRIX variant) */
-#define MNTOPT_GQUOTA   "gquota"        /* group quota (IRIX variant) */
-#define MNTOPT_PQUOTA   "pquota"        /* project quota (IRIX variant) */
-#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
-#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
-#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
-#define MNTOPT_QUOTANOENF  "qnoenforce" /* same as uqnoenforce */
 
-STATIC int
-xfs_qm_parseargs(
-        struct bhv_desc         *bhv,
-        char                    *options,
-        struct xfs_mount_args   *args,
-        int                     update)
-{
-        size_t                  length;
-        char                    *local_options = options;
-        char                    *this_char;
-        int                     error;
-        int                     referenced = update;
-
-        while ((this_char = strsep(&local_options, ",")) != NULL) {
-                length = strlen(this_char);
-                if (local_options)
-                        length++;
-
-                if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
-                        args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
-                        args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
-                        referenced = update;
-                } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
-                           !strcmp(this_char, MNTOPT_UQUOTA) ||
-                           !strcmp(this_char, MNTOPT_USRQUOTA)) {
-                        args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
-                        referenced = 1;
-                } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
-                           !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
-                        args->flags |= XFSMNT_UQUOTA;
-                        args->flags &= ~XFSMNT_UQUOTAENF;
-                        referenced = 1;
-                } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
-                           !strcmp(this_char, MNTOPT_PRJQUOTA)) {
-                        args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
-                        referenced = 1;
-                } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
-                        args->flags |= XFSMNT_PQUOTA;
-                        args->flags &= ~XFSMNT_PQUOTAENF;
-                        referenced = 1;
-                } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
-                           !strcmp(this_char, MNTOPT_GRPQUOTA)) {
-                        args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
-                        referenced = 1;
-                } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
-                        args->flags |= XFSMNT_GQUOTA;
-                        args->flags &= ~XFSMNT_GQUOTAENF;
-                        referenced = 1;
-                } else {
-                        if (local_options)
-                                *(local_options-1) = ',';
-                        continue;
-                }
-
-                while (length--)
-                        *this_char++ = ',';
-        }
-
-        if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
-                cmn_err(CE_WARN,
-                        "XFS: cannot mount with both project and group quota");
-                return XFS_ERROR(EINVAL);
-        }
-
-        error = bhv_next_vfs_parseargs(BHV_NEXT(bhv), options, args, update);
-        if (!error && !referenced)
-                bhv_remove_vfsops(bhvtovfs(bhv), VFS_POSITION_QM);
-        return error;
-}
-
-STATIC int
-xfs_qm_showargs(
-        struct bhv_desc         *bhv,
-        struct seq_file         *m)
-{
-        struct bhv_vfs          *vfsp = bhvtovfs(bhv);
-        struct xfs_mount        *mp = XFS_VFSTOM(vfsp);
-
-        if (mp->m_qflags & XFS_UQUOTA_ACCT) {
-                (mp->m_qflags & XFS_UQUOTA_ENFD) ?
-                        seq_puts(m, "," MNTOPT_USRQUOTA) :
-                        seq_puts(m, "," MNTOPT_UQUOTANOENF);
-        }
-
-        if (mp->m_qflags & XFS_PQUOTA_ACCT) {
-                (mp->m_qflags & XFS_OQUOTA_ENFD) ?
-                        seq_puts(m, "," MNTOPT_PRJQUOTA) :
-                        seq_puts(m, "," MNTOPT_PQUOTANOENF);
-        }
-
-        if (mp->m_qflags & XFS_GQUOTA_ACCT) {
-                (mp->m_qflags & XFS_OQUOTA_ENFD) ?
-                        seq_puts(m, "," MNTOPT_GRPQUOTA) :
-                        seq_puts(m, "," MNTOPT_GQUOTANOENF);
-        }
-
-        if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
-                seq_puts(m, "," MNTOPT_NOQUOTA);
-
-        return bhv_next_vfs_showargs(BHV_NEXT(bhv), m);
-}
-
-STATIC int
-xfs_qm_mount(
-        struct bhv_desc         *bhv,
-        struct xfs_mount_args   *args,
-        struct cred             *cr)
-{
-        struct bhv_vfs          *vfsp = bhvtovfs(bhv);
-        struct xfs_mount        *mp = XFS_VFSTOM(vfsp);
-
-        if (args->flags & (XFSMNT_UQUOTA | XFSMNT_GQUOTA | XFSMNT_PQUOTA))
-                xfs_qm_mount_quotainit(mp, args->flags);
-        return bhv_next_vfs_mount(BHV_NEXT(bhv), args, cr);
-}
-
-/*
- * Directory tree accounting is implemented using project quotas, where
- * the project identifier is inherited from parent directories.
- * A statvfs (df, etc.) of a directory that is using project quota should
- * return a statvfs of the project, not the entire filesystem.
- * This makes such trees appear as if they are filesystems in themselves.
- */
-STATIC int
-xfs_qm_statvfs(
-        struct bhv_desc         *bhv,
+STATIC void
+xfs_fill_statvfs_from_dquot(
         bhv_statvfs_t           *statp,
-        bhv_vnode_t             *vnode)
+        xfs_disk_dquot_t        *dp)
 {
-        xfs_mount_t             *mp;
-        xfs_inode_t             *ip;
-        xfs_dquot_t             *dqp;
-        xfs_disk_dquot_t        *dp;
         __uint64_t              limit;
-        int                     error;
-
-        error = bhv_next_vfs_statvfs(BHV_NEXT(bhv), statp, vnode);
-        if (error || !vnode)
-                return error;
-
-        mp = xfs_vfstom(bhvtovfs(bhv));
-        ip = xfs_vtoi(vnode);
-
-        if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
-                return 0;
-        if (!(mp->m_qflags & XFS_PQUOTA_ACCT))
-                return 0;
-        if (!(mp->m_qflags & XFS_OQUOTA_ENFD))
-                return 0;
-
-        if (xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp))
-                return 0;
-        dp = &dqp->q_core;
 
         limit = dp->d_blk_softlimit ?
                 be64_to_cpu(dp->d_blk_softlimit) :
@@ -234,37 +75,35 @@ xfs_qm_statvfs(
                         (statp->f_files > be64_to_cpu(dp->d_icount)) ?
                          (statp->f_ffree - be64_to_cpu(dp->d_icount)) : 0;
         }
-
-        xfs_qm_dqput(dqp);
-        return 0;
 }
 
-STATIC int
-xfs_qm_syncall(
-        struct bhv_desc         *bhv,
-        int                     flags,
-        cred_t                  *credp)
+
+/*
+ * Directory tree accounting is implemented using project quotas, where
+ * the project identifier is inherited from parent directories.
+ * A statvfs (df, etc.) of a directory that is using project quota should
+ * return a statvfs of the project, not the entire filesystem.
+ * This makes such trees appear as if they are filesystems in themselves.
+ */
+STATIC void
+xfs_qm_statvfs(
+        xfs_inode_t             *ip,
+        bhv_statvfs_t           *statp)
 {
-        struct bhv_vfs          *vfsp = bhvtovfs(bhv);
-        struct xfs_mount        *mp = XFS_VFSTOM(vfsp);
-        int                     error;
+        xfs_mount_t             *mp = ip->i_mount;
+        xfs_dquot_t             *dqp;
 
-        /*
-         * Get the Quota Manager to flush the dquots.
-         */
-        if (XFS_IS_QUOTA_ON(mp)) {
-                if ((error = xfs_qm_sync(mp, flags))) {
-                        /*
-                         * If we got an IO error, we will be shutting down.
-                         * So, there's nothing more for us to do here.
-                         */
-                        ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
-                        if (XFS_FORCED_SHUTDOWN(mp)) {
-                                return XFS_ERROR(error);
-                        }
-                }
+        if (!(ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) ||
+            !((mp->m_qflags & (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))) ==
+                              (XFS_PQUOTA_ACCT|XFS_OQUOTA_ENFD))
+                return;
+
+        if (!xfs_qm_dqget(mp, NULL, ip->i_d.di_projid, XFS_DQ_PROJ, 0, &dqp)) {
+                xfs_disk_dquot_t        *dp = &dqp->q_core;
+
+                xfs_fill_statvfs_from_dquot(statp, dp);
+                xfs_qm_dqput(dqp);
         }
-        return bhv_next_vfs_sync(BHV_NEXT(bhv), flags, credp);
 }
 
 STATIC int
@@ -382,7 +221,7 @@ xfs_qm_dqrele_null(
 }
 
 
-static struct xfs_qmops xfs_qmcore_xfs = {
+struct xfs_qmops xfs_qmcore_xfs = {
         .xfs_qminit             = xfs_qm_newmount,
         .xfs_qmdone             = xfs_qm_unmount_quotadestroy,
         .xfs_qmmount            = xfs_qm_endmount,
@@ -396,36 +235,24 @@ static struct xfs_qmops xfs_qmcore_xfs = {
         .xfs_dqvoprename        = xfs_qm_vop_rename_dqattach,
         .xfs_dqvopchown         = xfs_qm_vop_chown,
         .xfs_dqvopchownresv     = xfs_qm_vop_chown_reserve,
+        .xfs_dqstatvfs          = xfs_qm_statvfs,
+        .xfs_dqsync             = xfs_qm_sync,
+        .xfs_quotactl           = xfs_qm_quotactl,
         .xfs_dqtrxops           = &xfs_trans_dquot_ops,
 };
-
-struct bhv_module_vfsops xfs_qmops = { {
-        BHV_IDENTITY_INIT(VFS_BHV_QM, VFS_POSITION_QM),
-        .vfs_parseargs          = xfs_qm_parseargs,
-        .vfs_showargs           = xfs_qm_showargs,
-        .vfs_mount              = xfs_qm_mount,
-        .vfs_statvfs            = xfs_qm_statvfs,
-        .vfs_sync               = xfs_qm_syncall,
-        .vfs_quotactl           = xfs_qm_quotactl, },
-};
-
+EXPORT_SYMBOL(xfs_qmcore_xfs);
 
 void __init
 xfs_qm_init(void)
 {
-        static char     message[] __initdata =
-                KERN_INFO "SGI XFS Quota Management subsystem\n";
-
-        printk(message);
+        printk(KERN_INFO "SGI XFS Quota Management subsystem\n");
         mutex_init(&xfs_Gqm_lock);
-        vfs_bhv_set_custom(&xfs_qmops, &xfs_qmcore_xfs);
         xfs_qm_init_procfs();
 }
 
 void __exit
 xfs_qm_exit(void)
 {
-        vfs_bhv_clr_custom(&xfs_qmops);
         xfs_qm_cleanup_procfs();
         if (qm_dqzone)
                 kmem_zone_destroy(qm_dqzone);
diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c
index 2df67fd913e5..e0d024e73453 100644
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -81,17 +81,14 @@ STATIC void	xfs_qm_export_dquot(xfs_mount_t *, xfs_disk_dquot_t *,
  */
 int
 xfs_qm_quotactl(
-        struct bhv_desc *bdp,
+        xfs_mount_t     *mp,
         int             cmd,
         int             id,
         xfs_caddr_t     addr)
 {
-        xfs_mount_t     *mp;
-        bhv_vfs_t       *vfsp;
+        bhv_vfs_t       *vfsp = XFS_MTOVFS(mp);
         int             error;
 
-        vfsp = bhvtovfs(bdp);
-        mp = XFS_VFSTOM(vfsp);
 
         ASSERT(addr != NULL || cmd == Q_XQUOTASYNC);
 
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index a7cd596ec6d2..594d7856c77e 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -142,6 +142,9 @@ typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
                         struct xfs_dquot **, struct xfs_dquot *);
 typedef int     (*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
                         struct xfs_dquot *, struct xfs_dquot *, uint);
+typedef void    (*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *);
+typedef int     (*xfs_dqsync_t)(struct xfs_mount *, int flags);
+typedef int     (*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);
 
 typedef struct xfs_qmops {
         xfs_qminit_t            xfs_qminit;
@@ -157,35 +160,44 @@ typedef struct xfs_qmops {
         xfs_dqvoprename_t       xfs_dqvoprename;
         xfs_dqvopchown_t        xfs_dqvopchown;
         xfs_dqvopchownresv_t    xfs_dqvopchownresv;
+        xfs_dqstatvfs_t         xfs_dqstatvfs;
+        xfs_dqsync_t            xfs_dqsync;
+        xfs_quotactl_t          xfs_quotactl;
         struct xfs_dqtrxops     *xfs_dqtrxops;
 } xfs_qmops_t;
 
 #define XFS_QM_INIT(mp, mnt, fl) \
-        (*(mp)->m_qm_ops.xfs_qminit)(mp, mnt, fl)
+        (*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
 #define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
-        (*(mp)->m_qm_ops.xfs_qmmount)(mp, mnt, fl, mfsi_flags)
+        (*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl, mfsi_flags)
 #define XFS_QM_UNMOUNT(mp) \
-        (*(mp)->m_qm_ops.xfs_qmunmount)(mp)
+        (*(mp)->m_qm_ops->xfs_qmunmount)(mp)
 #define XFS_QM_DONE(mp) \
-        (*(mp)->m_qm_ops.xfs_qmdone)(mp)
+        (*(mp)->m_qm_ops->xfs_qmdone)(mp)
 #define XFS_QM_DQRELE(mp, dq) \
-        (*(mp)->m_qm_ops.xfs_dqrele)(dq)
+        (*(mp)->m_qm_ops->xfs_dqrele)(dq)
 #define XFS_QM_DQATTACH(mp, ip, fl) \
-        (*(mp)->m_qm_ops.xfs_dqattach)(ip, fl)
+        (*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
 #define XFS_QM_DQDETACH(mp, ip) \
-        (*(mp)->m_qm_ops.xfs_dqdetach)(ip)
+        (*(mp)->m_qm_ops->xfs_dqdetach)(ip)
 #define XFS_QM_DQPURGEALL(mp, fl) \
-        (*(mp)->m_qm_ops.xfs_dqpurgeall)(mp, fl)
+        (*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
 #define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
-        (*(mp)->m_qm_ops.xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
+        (*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
 #define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
-        (*(mp)->m_qm_ops.xfs_dqvopcreate)(tp, ip, dq1, dq2)
+        (*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
 #define XFS_QM_DQVOPRENAME(mp, ip) \
-        (*(mp)->m_qm_ops.xfs_dqvoprename)(ip)
+        (*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
 #define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
-        (*(mp)->m_qm_ops.xfs_dqvopchown)(tp, ip, dqp, dq)
+        (*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
 #define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
-        (*(mp)->m_qm_ops.xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
+        (*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
+#define XFS_QM_DQSTATVFS(ip, statp) \
+        (*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
+#define XFS_QM_DQSYNC(mp, flags) \
+        (*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
+#define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
+        (*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)
 
 
 /*
@@ -413,7 +425,7 @@ typedef struct xfs_mount {
         struct xfs_chash        *m_chash;       /* fs private inode per-cluster
                                                  * hash table */
         struct xfs_dmops        *m_dm_ops;      /* vector of DMI ops */
-        struct xfs_qmops        m_qm_ops;       /* vector of XQM ops */
+        struct xfs_qmops        *m_qm_ops;      /* vector of XQM ops */
         struct xfs_ioops        m_io_ops;       /* vector of I/O ops */
         atomic_t                m_active_trans; /* number trans frozen */
 #ifdef HAVE_PERCPU_SB
@@ -649,9 +661,10 @@ extern int	xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t);
 
 extern int      xfs_dmops_get(struct xfs_mount *, struct xfs_mount_args *);
 extern void     xfs_dmops_put(struct xfs_mount *);
+extern int      xfs_qmops_get(struct xfs_mount *, struct xfs_mount_args *);
+extern void     xfs_qmops_put(struct xfs_mount *);
 
 extern struct xfs_dmops xfs_dmcore_xfs;
-extern struct xfs_qmops xfs_qmcore_stub;
 extern struct xfs_ioops xfs_iocore_xfs;
 
 extern int      xfs_init(void);
diff --git a/fs/xfs/xfs_qmops.c b/fs/xfs/xfs_qmops.c
index 0d594ed7efef..ea08bd8e8b80 100644
--- a/fs/xfs/xfs_qmops.c
+++ b/fs/xfs/xfs_qmops.c
@@ -28,6 +28,8 @@
 #include "xfs_mount.h"
 #include "xfs_quota.h"
 #include "xfs_error.h"
+#include "xfs_clnt.h"
+
 
 STATIC struct xfs_dquot *
 xfs_dqvopchown_default(
@@ -110,7 +112,7 @@ xfs_noquota_init(
         return error;
 }
 
-xfs_qmops_t     xfs_qmcore_stub = {
+static struct xfs_qmops xfs_qmcore_stub = {
         .xfs_qminit             = (xfs_qminit_t) xfs_noquota_init,
         .xfs_qmdone             = (xfs_qmdone_t) fs_noerr,
         .xfs_qmmount            = (xfs_qmmount_t) fs_noerr,
@@ -124,4 +126,38 @@ xfs_qmops_t	xfs_qmcore_stub = {
         .xfs_dqvoprename        = (xfs_dqvoprename_t) fs_noerr,
         .xfs_dqvopchown         = xfs_dqvopchown_default,
         .xfs_dqvopchownresv     = (xfs_dqvopchownresv_t) fs_noerr,
+        .xfs_dqstatvfs          = (xfs_dqstatvfs_t) fs_noval,
+        .xfs_dqsync             = (xfs_dqsync_t) fs_noerr,
+        .xfs_quotactl           = (xfs_quotactl_t) fs_nosys,
 };
+
+int
+xfs_qmops_get(struct xfs_mount *mp, struct xfs_mount_args *args)
+{
+        if (args->flags & (XFSMNT_UQUOTA | XFSMNT_PQUOTA | XFSMNT_GQUOTA)) {
+                struct xfs_qmops *ops;
+
+                ops = symbol_get(xfs_qmcore_xfs);
+                if (!ops) {
+                        request_module("xfs_quota");
+                        ops = symbol_get(xfs_qmcore_xfs);
+                }
+
+                if (!ops) {
+                        cmn_err(CE_WARN, "XFS: no quota support available.");
+                        return EINVAL;
+                }
+                mp->m_qm_ops = ops;
+        } else {
+                mp->m_qm_ops = &xfs_qmcore_stub;
+        }
+
+        return 0;
+}
+
+void
+xfs_qmops_put(struct xfs_mount *mp)
+{
+        if (mp->m_qm_ops != &xfs_qmcore_stub)
+                symbol_put(xfs_qmcore_xfs);
+}
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index 6f14df976f73..12c4ec775af8 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -330,12 +330,12 @@ typedef struct xfs_dqtrxops {
 } xfs_dqtrxops_t;
 
 #define XFS_DQTRXOP(mp, tp, op, args...) \
-                ((mp)->m_qm_ops.xfs_dqtrxops ? \
-                ((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : 0)
+                ((mp)->m_qm_ops->xfs_dqtrxops ? \
+                ((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : 0)
 
 #define XFS_DQTRXOP_VOID(mp, tp, op, args...) \
-                ((mp)->m_qm_ops.xfs_dqtrxops ? \
-                ((mp)->m_qm_ops.xfs_dqtrxops->op)(tp, ## args) : (void)0)
+                ((mp)->m_qm_ops->xfs_dqtrxops ? \
+                ((mp)->m_qm_ops->xfs_dqtrxops->op)(tp, ## args) : (void)0)
 
 #define XFS_TRANS_DUP_DQINFO(mp, otp, ntp) \
         XFS_DQTRXOP_VOID(mp, otp, qo_dup_dqinfo, ntp)
@@ -364,7 +364,7 @@ typedef struct xfs_dqtrxops {
 extern int xfs_qm_dqcheck(xfs_disk_dquot_t *, xfs_dqid_t, uint, uint, char *);
 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
 
-extern struct bhv_module_vfsops xfs_qmops;
+extern struct xfs_qmops xfs_qmcore_xfs;
 
 #endif  /* __KERNEL__ */
 
diff --git a/fs/xfs/xfs_vfsops.c b/fs/xfs/xfs_vfsops.c
index 1cf8f54d8aa9..f62f6e486f23 100644
--- a/fs/xfs/xfs_vfsops.c
+++ b/fs/xfs/xfs_vfsops.c
@@ -402,6 +402,22 @@ xfs_finish_flags(
                         return XFS_ERROR(EINVAL);
         }
 
+        if (ap->flags & XFSMNT_UQUOTA) {
+                mp->m_qflags |= (XFS_UQUOTA_ACCT | XFS_UQUOTA_ACTIVE);
+                if (ap->flags & XFSMNT_UQUOTAENF)
+                        mp->m_qflags |= XFS_UQUOTA_ENFD;
+        }
+
+        if (ap->flags & XFSMNT_GQUOTA) {
+                mp->m_qflags |= (XFS_GQUOTA_ACCT | XFS_GQUOTA_ACTIVE);
+                if (ap->flags & XFSMNT_GQUOTAENF)
+                        mp->m_qflags |= XFS_OQUOTA_ENFD;
+        } else if (ap->flags & XFSMNT_PQUOTA) {
+                mp->m_qflags |= (XFS_PQUOTA_ACCT | XFS_PQUOTA_ACTIVE);
+                if (ap->flags & XFSMNT_PQUOTAENF)
+                        mp->m_qflags |= XFS_OQUOTA_ENFD;
+        }
+
         return 0;
 }
 
@@ -435,12 +451,13 @@ xfs_mount(
         error = xfs_dmops_get(mp, args);
         if (error)
                 return error;
+        error = xfs_qmops_get(mp, args);
+        if (error)
+                return error;
 
         /*
          * Setup xfs_mount function vectors from available behaviors
          */
-        p = vfs_bhv_lookup(vfsp, VFS_POSITION_QM);
-        mp->m_qm_ops = p ? *(xfs_qmops_t *) vfs_bhv_custom(p) : xfs_qmcore_stub;
         p = vfs_bhv_lookup(vfsp, VFS_POSITION_IO);
         mp->m_io_ops = p ? *(xfs_ioops_t *) vfs_bhv_custom(p) : xfs_iocore_xfs;
 
@@ -556,6 +573,7 @@ error1:
                 xfs_binval(mp->m_rtdev_targp);
 error0:
         xfs_unmountfs_close(mp, credp);
+        xfs_qmops_put(mp);
         xfs_dmops_put(mp);
         return error;
 }
@@ -647,6 +665,7 @@ out:
                  * and free the super block buffer & mount structures.
                  */
                 xfs_unmountfs(mp, credp);
+                xfs_qmops_put(mp);
                 xfs_dmops_put(mp);
                 kmem_free(mp, sizeof(xfs_mount_t));
         }
@@ -887,6 +906,8 @@ xfs_statvfs(
         xfs_statvfs_fsid(statp, mp);
         statp->f_namelen = MAXNAMELEN - 1;
 
+        if (vp)
+                XFS_QM_DQSTATVFS(xfs_vtoi(vp), statp);
         return 0;
 }
 
@@ -941,6 +962,25 @@ xfs_sync(
         cred_t          *credp)
 {
         xfs_mount_t     *mp = XFS_BHVTOM(bdp);
+        int             error;
+
+        /*
+         * Get the Quota Manager to flush the dquots.
+         *
+         * If XFS quota support is not enabled or this filesystem
+         * instance does not use quotas XFS_QM_DQSYNC will always
+         * return zero.
+         */
+        error = XFS_QM_DQSYNC(mp, flags);
+        if (error) {
+                /*
+                 * If we got an IO error, we will be shutting down.
+                 * So, there's nothing more for us to do here.
+                 */
+                ASSERT(error != EIO || XFS_FORCED_SHUTDOWN(mp));
+                if (XFS_FORCED_SHUTDOWN(mp))
+                        return XFS_ERROR(error);
+        }
 
         if (flags & SYNC_IOWAIT)
                 xfs_filestream_flush(mp);
@@ -1696,6 +1736,18 @@ xfs_vget(
 #define MNTOPT_ATTR2    "attr2"         /* do use attr2 attribute format */
 #define MNTOPT_NOATTR2  "noattr2"       /* do not use attr2 attribute format */
 #define MNTOPT_FILESTREAM  "filestreams" /* use filestreams allocator */
+#define MNTOPT_QUOTA    "quota"         /* disk quotas (user) */
+#define MNTOPT_NOQUOTA  "noquota"       /* no quotas */
+#define MNTOPT_USRQUOTA "usrquota"      /* user quota enabled */
+#define MNTOPT_GRPQUOTA "grpquota"      /* group quota enabled */
+#define MNTOPT_PRJQUOTA "prjquota"      /* project quota enabled */
+#define MNTOPT_UQUOTA   "uquota"        /* user quota (IRIX variant) */
+#define MNTOPT_GQUOTA   "gquota"        /* group quota (IRIX variant) */
+#define MNTOPT_PQUOTA   "pquota"        /* project quota (IRIX variant) */
+#define MNTOPT_UQUOTANOENF "uqnoenforce"/* user quota limit enforcement */
+#define MNTOPT_GQUOTANOENF "gqnoenforce"/* group quota limit enforcement */
+#define MNTOPT_PQUOTANOENF "pqnoenforce"/* project quota limit enforcement */
+#define MNTOPT_QUOTANOENF  "qnoenforce" /* same as uqnoenforce */
 #define MNTOPT_DMAPI    "dmapi"         /* DMI enabled (DMAPI / XDSM) */
 #define MNTOPT_XDSM     "xdsm"          /* DMI enabled (DMAPI / XDSM) */
 #define MNTOPT_DMI      "dmi"           /* DMI enabled (DMAPI / XDSM) */
@@ -1889,6 +1941,29 @@ xfs_parseargs(
                         args->flags &= ~XFSMNT_ATTR2;
                 } else if (!strcmp(this_char, MNTOPT_FILESTREAM)) {
                         args->flags2 |= XFSMNT2_FILESTREAMS;
+                } else if (!strcmp(this_char, MNTOPT_NOQUOTA)) {
+                        args->flags &= ~(XFSMNT_UQUOTAENF|XFSMNT_UQUOTA);
+                        args->flags &= ~(XFSMNT_GQUOTAENF|XFSMNT_GQUOTA);
+                } else if (!strcmp(this_char, MNTOPT_QUOTA) ||
+                           !strcmp(this_char, MNTOPT_UQUOTA) ||
+                           !strcmp(this_char, MNTOPT_USRQUOTA)) {
+                        args->flags |= XFSMNT_UQUOTA | XFSMNT_UQUOTAENF;
+                } else if (!strcmp(this_char, MNTOPT_QUOTANOENF) ||
+                           !strcmp(this_char, MNTOPT_UQUOTANOENF)) {
+                        args->flags |= XFSMNT_UQUOTA;
+                        args->flags &= ~XFSMNT_UQUOTAENF;
+                } else if (!strcmp(this_char, MNTOPT_PQUOTA) ||
+                           !strcmp(this_char, MNTOPT_PRJQUOTA)) {
+                        args->flags |= XFSMNT_PQUOTA | XFSMNT_PQUOTAENF;
+                } else if (!strcmp(this_char, MNTOPT_PQUOTANOENF)) {
+                        args->flags |= XFSMNT_PQUOTA;
+                        args->flags &= ~XFSMNT_PQUOTAENF;
+                } else if (!strcmp(this_char, MNTOPT_GQUOTA) ||
+                           !strcmp(this_char, MNTOPT_GRPQUOTA)) {
+                        args->flags |= XFSMNT_GQUOTA | XFSMNT_GQUOTAENF;
+                } else if (!strcmp(this_char, MNTOPT_GQUOTANOENF)) {
+                        args->flags |= XFSMNT_GQUOTA;
+                        args->flags &= ~XFSMNT_GQUOTAENF;
                 } else if (!strcmp(this_char, MNTOPT_DMAPI)) {
                         args->flags |= XFSMNT_DMAPI;
                 } else if (!strcmp(this_char, MNTOPT_XDSM)) {
@@ -1926,6 +2001,12 @@ xfs_parseargs(
                 return EINVAL;
         }
 
+        if ((args->flags & XFSMNT_GQUOTA) && (args->flags & XFSMNT_PQUOTA)) {
+                cmn_err(CE_WARN,
+                        "XFS: cannot mount with both project and group quota");
+                return EINVAL;
+        }
+
         if ((args->flags & XFSMNT_DMAPI) && *args->mtpt == '\0') {
                 printk("XFS: %s option needs the mount point option as well\n",
                         MNTOPT_DMAPI);
@@ -2025,9 +2106,32 @@ xfs_showargs(
         if (vfsp->vfs_flag & VFS_GRPID)
                 seq_printf(m, "," MNTOPT_GRPID);
 
+        if (mp->m_qflags & XFS_UQUOTA_ACCT) {
+                if (mp->m_qflags & XFS_UQUOTA_ENFD)
+                        seq_puts(m, "," MNTOPT_USRQUOTA);
+                else
+                        seq_puts(m, "," MNTOPT_UQUOTANOENF);
+        }
+
+        if (mp->m_qflags & XFS_PQUOTA_ACCT) {
+                if (mp->m_qflags & XFS_OQUOTA_ENFD)
+                        seq_puts(m, "," MNTOPT_PRJQUOTA);
+                else
+                        seq_puts(m, "," MNTOPT_PQUOTANOENF);
+        }
+
+        if (mp->m_qflags & XFS_GQUOTA_ACCT) {
+                if (mp->m_qflags & XFS_OQUOTA_ENFD)
+                        seq_puts(m, "," MNTOPT_GRPQUOTA);
+                else
+                        seq_puts(m, "," MNTOPT_GQUOTANOENF);
+        }
+
+        if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
+                seq_puts(m, "," MNTOPT_NOQUOTA);
+
         if (vfsp->vfs_flag & VFS_DMI)
                 seq_puts(m, "," MNTOPT_DMAPI);
-
         return 0;
 }