quota: unify ->set_dqblk

Pass the larger struct fs_disk_quota to the ->set_dqblk operation so
that the Q_SETQUOTA and Q_XSETQUOTA operations can be implemented
with a single filesystem operation and we can retire the ->set_xquota
operation.  The additional information (RT-subvolume accounting and
warn counts) are left zero for the VFS quota implementation.

Add new fieldmask values for setting the numer of blocks and inodes
values which is required for the VFS quota, but wasn't for XFS.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>

8 files changed, 98 insertions, 40 deletions

diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index dec93577a783..49667d68769e 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1521,8 +1521,8 @@ out:
 /* GFS2 only supports a subset of the XFS fields */
 #define GFS2_FIELDMASK (FS_DQ_BSOFT|FS_DQ_BHARD)
 
-static int gfs2_xquota_set(struct super_block *sb, int type, qid_t id,
-                           struct fs_disk_quota *fdq)
+static int gfs2_set_dqblk(struct super_block *sb, int type, qid_t id,
+                          struct fs_disk_quota *fdq)
 {
         struct gfs2_sbd *sdp = sb->s_fs_info;
         struct gfs2_inode *ip = GFS2_I(sdp->sd_quota_inode);
@@ -1630,6 +1630,6 @@ const struct quotactl_ops gfs2_quotactl_ops = {
         .quota_sync     = gfs2_quota_sync,
         .get_xstate     = gfs2_quota_get_xstate,
         .get_dqblk      = gfs2_get_dqblk,
-        .set_xquota     = gfs2_xquota_set,
+        .set_dqblk      = gfs2_set_dqblk,
 };
 
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 6aed77fc99c7..b1a5036560a9 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -2338,51 +2338,70 @@ int vfs_get_dqblk(struct super_block *sb, int type, qid_t id,
 }
 EXPORT_SYMBOL(vfs_get_dqblk);
 
+#define VFS_FS_DQ_MASK \
+        (FS_DQ_BCOUNT | FS_DQ_BSOFT | FS_DQ_BHARD | \
+         FS_DQ_ICOUNT | FS_DQ_ISOFT | FS_DQ_IHARD | \
+         FS_DQ_BTIMER | FS_DQ_ITIMER)
+
 /* Generic routine for setting common part of quota structure */
-static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
+static int do_set_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
 {
         struct mem_dqblk *dm = &dquot->dq_dqb;
         int check_blim = 0, check_ilim = 0;
         struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
 
-        if ((di->dqb_valid & QIF_BLIMITS &&
-             (di->dqb_bhardlimit > dqi->dqi_maxblimit ||
-              di->dqb_bsoftlimit > dqi->dqi_maxblimit)) ||
-            (di->dqb_valid & QIF_ILIMITS &&
-             (di->dqb_ihardlimit > dqi->dqi_maxilimit ||
-              di->dqb_isoftlimit > dqi->dqi_maxilimit)))
+        if (di->d_fieldmask & ~VFS_FS_DQ_MASK)
+                return -EINVAL;
+
+        if (((di->d_fieldmask & FS_DQ_BSOFT) &&
+             (di->d_blk_softlimit > dqi->dqi_maxblimit)) ||
+            ((di->d_fieldmask & FS_DQ_BHARD) &&
+             (di->d_blk_hardlimit > dqi->dqi_maxblimit)) ||
+            ((di->d_fieldmask & FS_DQ_ISOFT) &&
+             (di->d_ino_softlimit > dqi->dqi_maxilimit)) ||
+            ((di->d_fieldmask & FS_DQ_IHARD) &&
+             (di->d_ino_hardlimit > dqi->dqi_maxilimit)))
                 return -ERANGE;
 
         spin_lock(&dq_data_lock);
-        if (di->dqb_valid & QIF_SPACE) {
-                dm->dqb_curspace = di->dqb_curspace - dm->dqb_rsvspace;
+        if (di->d_fieldmask & FS_DQ_BCOUNT) {
+                dm->dqb_curspace = di->d_bcount - dm->dqb_rsvspace;
                 check_blim = 1;
                 set_bit(DQ_LASTSET_B + QIF_SPACE_B, &dquot->dq_flags);
         }
-        if (di->dqb_valid & QIF_BLIMITS) {
-                dm->dqb_bsoftlimit = qbtos(di->dqb_bsoftlimit);
-                dm->dqb_bhardlimit = qbtos(di->dqb_bhardlimit);
+
+        if (di->d_fieldmask & FS_DQ_BSOFT)
+                dm->dqb_bsoftlimit = qbtos(di->d_blk_softlimit);
+        if (di->d_fieldmask & FS_DQ_BHARD)
+                dm->dqb_bhardlimit = qbtos(di->d_blk_hardlimit);
+        if (di->d_fieldmask & (FS_DQ_BSOFT | FS_DQ_BHARD)) {
                 check_blim = 1;
                 set_bit(DQ_LASTSET_B + QIF_BLIMITS_B, &dquot->dq_flags);
         }
-        if (di->dqb_valid & QIF_INODES) {
-                dm->dqb_curinodes = di->dqb_curinodes;
+
+        if (di->d_fieldmask & FS_DQ_ICOUNT) {
+                dm->dqb_curinodes = di->d_icount;
                 check_ilim = 1;
                 set_bit(DQ_LASTSET_B + QIF_INODES_B, &dquot->dq_flags);
         }
-        if (di->dqb_valid & QIF_ILIMITS) {
-                dm->dqb_isoftlimit = di->dqb_isoftlimit;
-                dm->dqb_ihardlimit = di->dqb_ihardlimit;
+
+        if (di->d_fieldmask & FS_DQ_ISOFT)
+                dm->dqb_isoftlimit = di->d_ino_softlimit;
+        if (di->d_fieldmask & FS_DQ_IHARD)
+                dm->dqb_ihardlimit = di->d_ino_hardlimit;
+        if (di->d_fieldmask & (FS_DQ_ISOFT | FS_DQ_IHARD)) {
                 check_ilim = 1;
                 set_bit(DQ_LASTSET_B + QIF_ILIMITS_B, &dquot->dq_flags);
         }
-        if (di->dqb_valid & QIF_BTIME) {
-                dm->dqb_btime = di->dqb_btime;
+
+        if (di->d_fieldmask & FS_DQ_BTIMER) {
+                dm->dqb_btime = di->d_btimer;
                 check_blim = 1;
                 set_bit(DQ_LASTSET_B + QIF_BTIME_B, &dquot->dq_flags);
         }
-        if (di->dqb_valid & QIF_ITIME) {
-                dm->dqb_itime = di->dqb_itime;
+
+        if (di->d_fieldmask & FS_DQ_ITIMER) {
+                dm->dqb_itime = di->d_itimer;
                 check_ilim = 1;
                 set_bit(DQ_LASTSET_B + QIF_ITIME_B, &dquot->dq_flags);
         }
@@ -2392,7 +2411,7 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
                     dm->dqb_curspace < dm->dqb_bsoftlimit) {
                         dm->dqb_btime = 0;
                         clear_bit(DQ_BLKS_B, &dquot->dq_flags);
-                } else if (!(di->dqb_valid & QIF_BTIME))
+                } else if (!(di->d_fieldmask & FS_DQ_BTIMER))
                         /* Set grace only if user hasn't provided his own... */
                         dm->dqb_btime = get_seconds() + dqi->dqi_bgrace;
         }
@@ -2401,7 +2420,7 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
                     dm->dqb_curinodes < dm->dqb_isoftlimit) {
                         dm->dqb_itime = 0;
                         clear_bit(DQ_INODES_B, &dquot->dq_flags);
-                } else if (!(di->dqb_valid & QIF_ITIME))
+                } else if (!(di->d_fieldmask & FS_DQ_ITIMER))
                         /* Set grace only if user hasn't provided his own... */
                         dm->dqb_itime = get_seconds() + dqi->dqi_igrace;
         }
@@ -2417,7 +2436,7 @@ static int do_set_dqblk(struct dquot *dquot, struct if_dqblk *di)
 }
 
 int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
-                  struct if_dqblk *di)
+                  struct fs_disk_quota *di)
 {
         struct dquot *dquot;
         int rc;
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index 8680e257c2bd..d6ee49dda4fd 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -167,18 +167,44 @@ static int quota_getquota(struct super_block *sb, int type, qid_t id,
         return 0;
 }
 
+static void copy_from_if_dqblk(struct fs_disk_quota *dst, struct if_dqblk *src)
+{
+        dst->d_blk_hardlimit = src->dqb_bhardlimit;
+        dst->d_blk_softlimit  = src->dqb_bsoftlimit;
+        dst->d_bcount = src->dqb_curspace;
+        dst->d_ino_hardlimit = src->dqb_ihardlimit;
+        dst->d_ino_softlimit = src->dqb_isoftlimit;
+        dst->d_icount = src->dqb_curinodes;
+        dst->d_btimer = src->dqb_btime;
+        dst->d_itimer = src->dqb_itime;
+
+        dst->d_fieldmask = 0;
+        if (src->dqb_valid & QIF_BLIMITS)
+                dst->d_fieldmask |= FS_DQ_BSOFT | FS_DQ_BHARD;
+        if (src->dqb_valid & QIF_SPACE)
+                dst->d_fieldmask |= FS_DQ_BCOUNT;
+        if (src->dqb_valid & QIF_ILIMITS)
+                dst->d_fieldmask |= FS_DQ_ISOFT | FS_DQ_IHARD;
+        if (src->dqb_valid & QIF_INODES)
+                dst->d_fieldmask |= FS_DQ_ICOUNT;
+        if (src->dqb_valid & QIF_BTIME)
+                dst->d_fieldmask |= FS_DQ_BTIMER;
+        if (src->dqb_valid & QIF_ITIME)
+                dst->d_fieldmask |= FS_DQ_ITIMER;
+}
+
 static int quota_setquota(struct super_block *sb, int type, qid_t id,
                           void __user *addr)
 {
+        struct fs_disk_quota fdq;
         struct if_dqblk idq;
 
         if (copy_from_user(&idq, addr, sizeof(idq)))
                 return -EFAULT;
-        if (!sb_has_quota_active(sb, type))
-                return -ESRCH;
         if (!sb->s_qcop->set_dqblk)
                 return -ENOSYS;
-        return sb->s_qcop->set_dqblk(sb, type, id, &idq);
+        copy_from_if_dqblk(&fdq, &idq);
+        return sb->s_qcop->set_dqblk(sb, type, id, &fdq);
 }
 
 static int quota_setxstate(struct super_block *sb, int cmd, void __user *addr)
@@ -212,9 +238,9 @@ static int quota_setxquota(struct super_block *sb, int type, qid_t id,
 
         if (copy_from_user(&fdq, addr, sizeof(fdq)))
                 return -EFAULT;
-        if (!sb->s_qcop->set_xquota)
+        if (!sb->s_qcop->set_dqblk)
                 return -ENOSYS;
-        return sb->s_qcop->set_xquota(sb, type, id, &fdq);
+        return sb->s_qcop->set_dqblk(sb, type, id, &fdq);
 }
 
 static int quota_getxquota(struct super_block *sb, int type, qid_t id,
diff --git a/fs/xfs/linux-2.6/xfs_quotaops.c b/fs/xfs/linux-2.6/xfs_quotaops.c
index 3d473f43c9a9..e31bf21fe5d3 100644
--- a/fs/xfs/linux-2.6/xfs_quotaops.c
+++ b/fs/xfs/linux-2.6/xfs_quotaops.c
@@ -114,7 +114,7 @@ xfs_fs_get_dqblk(
 }
 
 STATIC int
-xfs_fs_set_xquota(
+xfs_fs_set_dqblk(
         struct super_block      *sb,
         int                     type,
         qid_t                   id,
@@ -136,5 +136,5 @@ const struct quotactl_ops xfs_quotactl_operations = {
         .get_xstate             = xfs_fs_get_xstate,
         .set_xstate             = xfs_fs_set_xstate,
         .get_dqblk              = xfs_fs_get_dqblk,
-        .set_xquota             = xfs_fs_set_xquota,
+        .set_dqblk              = xfs_fs_set_dqblk,
 };
diff --git a/fs/xfs/quota/xfs_qm_syscalls.c b/fs/xfs/quota/xfs_qm_syscalls.c
index 26fa43140f2e..92b002f1805f 100644
--- a/fs/xfs/quota/xfs_qm_syscalls.c
+++ b/fs/xfs/quota/xfs_qm_syscalls.c
@@ -448,6 +448,9 @@ xfs_qm_scall_getqstat(
         return 0;
 }
 
+#define XFS_DQ_MASK \
+        (FS_DQ_LIMIT_MASK | FS_DQ_TIMER_MASK | FS_DQ_WARNS_MASK)
+
 /*
  * Adjust quota limits, and start/stop timers accordingly.
  */
@@ -465,9 +468,10 @@ xfs_qm_scall_setqlim(
         int                     error;
         xfs_qcnt_t              hard, soft;
 
-        if ((newlim->d_fieldmask &
-            (FS_DQ_LIMIT_MASK|FS_DQ_TIMER_MASK|FS_DQ_WARNS_MASK)) == 0)
-                return (0);
+        if (newlim->d_fieldmask & ~XFS_DQ_MASK)
+                return EINVAL;
+        if ((newlim->d_fieldmask & XFS_DQ_MASK) == 0)
+                return 0;
 
         tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SETQLIM);
         if ((error = xfs_trans_reserve(tp, 0, sizeof(xfs_disk_dquot_t) + 128,
diff --git a/include/linux/dqblk_xfs.h b/include/linux/dqblk_xfs.h
index 527504c11c5e..4389ae72024e 100644
--- a/include/linux/dqblk_xfs.h
+++ b/include/linux/dqblk_xfs.h
@@ -110,6 +110,15 @@ typedef struct fs_disk_quota {
 #define FS_DQ_WARNS_MASK        (FS_DQ_BWARNS | FS_DQ_IWARNS | FS_DQ_RTBWARNS)
 
 /*
+ * Accounting values.  These can only be set for filesystem with
+ * non-transactional quotas that require quotacheck(8) in userspace.
+ */
+#define FS_DQ_BCOUNT            (1<<12)
+#define FS_DQ_ICOUNT            (1<<13)
+#define FS_DQ_RTBCOUNT          (1<<14)
+#define FS_DQ_ACCT_MASK         (FS_DQ_BCOUNT | FS_DQ_ICOUNT | FS_DQ_RTBCOUNT)
+
+/*
  * Various flags related to quotactl(2).  Only relevant to XFS filesystems.
  */
 #define XFS_QUOTA_UDQ_ACCT      (1<<0)  /* user quota accounting */
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 42364219dc9b..7126a15467f1 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -338,10 +338,9 @@ struct quotactl_ops {
         int (*get_info)(struct super_block *, int, struct if_dqinfo *);
         int (*set_info)(struct super_block *, int, struct if_dqinfo *);
         int (*get_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *);
-        int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
+        int (*set_dqblk)(struct super_block *, int, qid_t, struct fs_disk_quota *);
         int (*get_xstate)(struct super_block *, struct fs_quota_stat *);
         int (*set_xstate)(struct super_block *, unsigned int, int);
-        int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
 };
 
 struct quota_format_type {
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index d32a48631b0d..82c70c42d035 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -65,7 +65,8 @@ int vfs_get_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 int vfs_set_dqinfo(struct super_block *sb, int type, struct if_dqinfo *ii);
 int vfs_get_dqblk(struct super_block *sb, int type, qid_t id,
                 struct fs_disk_quota *di);
-int vfs_set_dqblk(struct super_block *sb, int type, qid_t id, struct if_dqblk *di);
+int vfs_set_dqblk(struct super_block *sb, int type, qid_t id,
+                struct fs_disk_quota *di);
 
 int dquot_transfer(struct inode *inode, struct iattr *iattr);
 int vfs_dq_quota_on_remount(struct super_block *sb);