9 files changed, 102 insertions, 82 deletions

diff --git a/fs/ext3/super.c b/fs/ext3/super.c
index ff9bcdc5b0d5..73e42f5c7009 100644
--- a/fs/ext3/super.c
+++ b/fs/ext3/super.c
@@ -2814,7 +2814,7 @@ static int ext3_statfs (struct dentry * dentry, struct kstatfs * buf)
 
 static inline struct inode *dquot_to_inode(struct dquot *dquot)
 {
-        return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
+        return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];
 }
 
 static int ext3_write_dquot(struct dquot *dquot)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index d76ec8277d3f..78e6036ff244 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -4796,7 +4796,7 @@ static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf)
 
 static inline struct inode *dquot_to_inode(struct dquot *dquot)
 {
-        return sb_dqopt(dquot->dq_sb)->files[dquot->dq_type];
+        return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type];
 }
 
 static int ext4_write_dquot(struct dquot *dquot)
diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 0a86e302655f..332a281f217e 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -95,7 +95,7 @@ static void ocfs2_global_mem2diskdqb(void *dp, struct dquot *dquot)
         struct ocfs2_global_disk_dqblk *d = dp;
         struct mem_dqblk *m = &dquot->dq_dqb;
 
-        d->dqb_id = cpu_to_le32(dquot->dq_id);
+        d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
         d->dqb_use_count = cpu_to_le32(OCFS2_DQUOT(dquot)->dq_use_count);
         d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
         d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
@@ -112,11 +112,14 @@ static int ocfs2_global_is_id(void *dp, struct dquot *dquot)
 {
         struct ocfs2_global_disk_dqblk *d = dp;
         struct ocfs2_mem_dqinfo *oinfo =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
 
         if (qtree_entry_unused(&oinfo->dqi_gi, dp))
                 return 0;
-        return le32_to_cpu(d->dqb_id) == dquot->dq_id;
+
+        return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
+                                le32_to_cpu(d->dqb_id)),
+                      dquot->dq_id);
 }
 
 struct qtree_fmt_operations ocfs2_global_ops = {
@@ -475,7 +478,7 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
 {
         int err, err2;
         struct super_block *sb = dquot->dq_sb;
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
         struct ocfs2_global_disk_dqblk dqblk;
         s64 spacechange, inodechange;
@@ -504,7 +507,8 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
         olditime = dquot->dq_dqb.dqb_itime;
         oldbtime = dquot->dq_dqb.dqb_btime;
         ocfs2_global_disk2memdqb(dquot, &dqblk);
-        trace_ocfs2_sync_dquot(dquot->dq_id, dquot->dq_dqb.dqb_curspace,
+        trace_ocfs2_sync_dquot(from_kqid(&init_user_ns, dquot->dq_id),
+                               dquot->dq_dqb.dqb_curspace,
                                (long long)spacechange,
                                dquot->dq_dqb.dqb_curinodes,
                                (long long)inodechange);
@@ -555,8 +559,8 @@ int __ocfs2_sync_dquot(struct dquot *dquot, int freeing)
         err = ocfs2_qinfo_lock(info, freeing);
         if (err < 0) {
                 mlog(ML_ERROR, "Failed to lock quota info, losing quota write"
-                               " (type=%d, id=%u)\n", dquot->dq_type,
-                               (unsigned)dquot->dq_id);
+                               " (type=%d, id=%u)\n", dquot->dq_id.type,
+                               (unsigned)from_kqid(&init_user_ns, dquot->dq_id));
                 goto out;
         }
         if (freeing)
@@ -591,9 +595,10 @@ static int ocfs2_sync_dquot_helper(struct dquot *dquot, unsigned long type)
         struct ocfs2_super *osb = OCFS2_SB(sb);
         int status = 0;
 
-        trace_ocfs2_sync_dquot_helper(dquot->dq_id, dquot->dq_type,
+        trace_ocfs2_sync_dquot_helper(from_kqid(&init_user_ns, dquot->dq_id),
+                                      dquot->dq_id.type,
                                       type, sb->s_id);
-        if (type != dquot->dq_type)
+        if (type != dquot->dq_id.type)
                 goto out;
         status = ocfs2_lock_global_qf(oinfo, 1);
         if (status < 0)
@@ -643,7 +648,8 @@ static int ocfs2_write_dquot(struct dquot *dquot)
         struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
         int status = 0;
 
-        trace_ocfs2_write_dquot(dquot->dq_id, dquot->dq_type);
+        trace_ocfs2_write_dquot(from_kqid(&init_user_ns, dquot->dq_id),
+                                dquot->dq_id.type);
 
         handle = ocfs2_start_trans(osb, OCFS2_QWRITE_CREDITS);
         if (IS_ERR(handle)) {
@@ -677,11 +683,12 @@ static int ocfs2_release_dquot(struct dquot *dquot)
 {
         handle_t *handle;
         struct ocfs2_mem_dqinfo *oinfo =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
         struct ocfs2_super *osb = OCFS2_SB(dquot->dq_sb);
         int status = 0;
 
-        trace_ocfs2_release_dquot(dquot->dq_id, dquot->dq_type);
+        trace_ocfs2_release_dquot(from_kqid(&init_user_ns, dquot->dq_id),
+                                  dquot->dq_id.type);
 
         mutex_lock(&dquot->dq_lock);
         /* Check whether we are not racing with some other dqget() */
@@ -691,7 +698,7 @@ static int ocfs2_release_dquot(struct dquot *dquot)
         if (status < 0)
                 goto out;
         handle = ocfs2_start_trans(osb,
-                ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_type));
+                ocfs2_calc_qdel_credits(dquot->dq_sb, dquot->dq_id.type));
         if (IS_ERR(handle)) {
                 status = PTR_ERR(handle);
                 mlog_errno(status);
@@ -733,13 +740,14 @@ static int ocfs2_acquire_dquot(struct dquot *dquot)
         int ex = 0;
         struct super_block *sb = dquot->dq_sb;
         struct ocfs2_super *osb = OCFS2_SB(sb);
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct ocfs2_mem_dqinfo *info = sb_dqinfo(sb, type)->dqi_priv;
         struct inode *gqinode = info->dqi_gqinode;
         int need_alloc = ocfs2_global_qinit_alloc(sb, type);
         handle_t *handle;
 
-        trace_ocfs2_acquire_dquot(dquot->dq_id, type);
+        trace_ocfs2_acquire_dquot(from_kqid(&init_user_ns, dquot->dq_id),
+                                  type);
         mutex_lock(&dquot->dq_lock);
         /*
          * We need an exclusive lock, because we're going to update use count
@@ -821,12 +829,13 @@ static int ocfs2_mark_dquot_dirty(struct dquot *dquot)
         int sync = 0;
         int status;
         struct super_block *sb = dquot->dq_sb;
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct ocfs2_mem_dqinfo *oinfo = sb_dqinfo(sb, type)->dqi_priv;
         handle_t *handle;
         struct ocfs2_super *osb = OCFS2_SB(sb);
 
-        trace_ocfs2_mark_dquot_dirty(dquot->dq_id, type);
+        trace_ocfs2_mark_dquot_dirty(from_kqid(&init_user_ns, dquot->dq_id),
+                                     type);
 
         /* In case user set some limits, sync dquot immediately to global
          * quota file so that information propagates quicker */
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
index 020f0ba29ee5..27fe7ee4874c 100644
--- a/fs/ocfs2/quota_local.c
+++ b/fs/ocfs2/quota_local.c
@@ -883,7 +883,8 @@ static void olq_set_dquot(struct buffer_head *bh, void *private)
         dqblk = (struct ocfs2_local_disk_dqblk *)(bh->b_data
                 + ol_dqblk_block_offset(sb, od->dq_local_off));
 
-        dqblk->dqb_id = cpu_to_le64(od->dq_dquot.dq_id);
+        dqblk->dqb_id = cpu_to_le64(from_kqid(&init_user_ns,
+                                              od->dq_dquot.dq_id));
         spin_lock(&dq_data_lock);
         dqblk->dqb_spacemod = cpu_to_le64(od->dq_dquot.dq_dqb.dqb_curspace -
                                           od->dq_origspace);
@@ -893,7 +894,7 @@ static void olq_set_dquot(struct buffer_head *bh, void *private)
         trace_olq_set_dquot(
                 (unsigned long long)le64_to_cpu(dqblk->dqb_spacemod),
                 (unsigned long long)le64_to_cpu(dqblk->dqb_inodemod),
-                od->dq_dquot.dq_id);
+                from_kqid(&init_user_ns, od->dq_dquot.dq_id));
 }
 
 /* Write dquot to local quota file */
@@ -902,7 +903,7 @@ int ocfs2_local_write_dquot(struct dquot *dquot)
         struct super_block *sb = dquot->dq_sb;
         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
         struct buffer_head *bh;
-        struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_type];
+        struct inode *lqinode = sb_dqopt(sb)->files[dquot->dq_id.type];
         int status;
 
         status = ocfs2_read_quota_phys_block(lqinode, od->dq_local_phys_blk,
@@ -1223,7 +1224,7 @@ static void olq_alloc_dquot(struct buffer_head *bh, void *private)
 int ocfs2_create_local_dquot(struct dquot *dquot)
 {
         struct super_block *sb = dquot->dq_sb;
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct inode *lqinode = sb_dqopt(sb)->files[type];
         struct ocfs2_quota_chunk *chunk;
         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
@@ -1277,7 +1278,7 @@ out:
 int ocfs2_local_release_dquot(handle_t *handle, struct dquot *dquot)
 {
         int status;
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct ocfs2_dquot *od = OCFS2_DQUOT(dquot);
         struct super_block *sb = dquot->dq_sb;
         struct ocfs2_local_disk_chunk *dchunk;
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index 53e377a59b05..efaeed35476f 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -267,7 +267,7 @@ hashfn(const struct super_block *sb, unsigned int id, int type)
 static inline void insert_dquot_hash(struct dquot *dquot)
 {
         struct hlist_head *head;
-        head = dquot_hash + hashfn(dquot->dq_sb, dquot->dq_id, dquot->dq_type);
+        head = dquot_hash + hashfn(dquot->dq_sb, from_kqid(&init_user_ns, dquot->dq_id), dquot->dq_id.type);
         hlist_add_head(&dquot->dq_hash, head);
 }
 
@@ -279,13 +279,13 @@ static inline void remove_dquot_hash(struct dquot *dquot)
 static struct dquot *find_dquot(unsigned int hashent, struct super_block *sb,
                                 unsigned int id, int type)
 {
+        struct kqid qid = make_kqid(&init_user_ns, type, id);
         struct hlist_node *node;
         struct dquot *dquot;
 
         hlist_for_each (node, dquot_hash+hashent) {
                 dquot = hlist_entry(node, struct dquot, dq_hash);
-                if (dquot->dq_sb == sb && dquot->dq_id == id &&
-                    dquot->dq_type == type)
+                if (dquot->dq_sb == sb && qid_eq(dquot->dq_id, qid))
                         return dquot;
         }
         return NULL;
@@ -351,7 +351,7 @@ int dquot_mark_dquot_dirty(struct dquot *dquot)
         spin_lock(&dq_list_lock);
         if (!test_and_set_bit(DQ_MOD_B, &dquot->dq_flags)) {
                 list_add(&dquot->dq_dirty, &sb_dqopt(dquot->dq_sb)->
-                                info[dquot->dq_type].dqi_dirty_list);
+                                info[dquot->dq_id.type].dqi_dirty_list);
                 ret = 0;
         }
         spin_unlock(&dq_list_lock);
@@ -410,17 +410,17 @@ int dquot_acquire(struct dquot *dquot)
         mutex_lock(&dquot->dq_lock);
         mutex_lock(&dqopt->dqio_mutex);
         if (!test_bit(DQ_READ_B, &dquot->dq_flags))
-                ret = dqopt->ops[dquot->dq_type]->read_dqblk(dquot);
+                ret = dqopt->ops[dquot->dq_id.type]->read_dqblk(dquot);
         if (ret < 0)
                 goto out_iolock;
         set_bit(DQ_READ_B, &dquot->dq_flags);
         /* Instantiate dquot if needed */
         if (!test_bit(DQ_ACTIVE_B, &dquot->dq_flags) && !dquot->dq_off) {
-                ret = dqopt->ops[dquot->dq_type]->commit_dqblk(dquot);
+                ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot);
                 /* Write the info if needed */
-                if (info_dirty(&dqopt->info[dquot->dq_type])) {
-                        ret2 = dqopt->ops[dquot->dq_type]->write_file_info(
-                                                dquot->dq_sb, dquot->dq_type);
+                if (info_dirty(&dqopt->info[dquot->dq_id.type])) {
+                        ret2 = dqopt->ops[dquot->dq_id.type]->write_file_info(
+                                        dquot->dq_sb, dquot->dq_id.type);
                 }
                 if (ret < 0)
                         goto out_iolock;
@@ -455,7 +455,7 @@ int dquot_commit(struct dquot *dquot)
         /* Inactive dquot can be only if there was error during read/init
          * => we have better not writing it */
         if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags))
-                ret = dqopt->ops[dquot->dq_type]->commit_dqblk(dquot);
+                ret = dqopt->ops[dquot->dq_id.type]->commit_dqblk(dquot);
         else
                 ret = -EIO;
 out_sem:
@@ -477,12 +477,12 @@ int dquot_release(struct dquot *dquot)
         if (atomic_read(&dquot->dq_count) > 1)
                 goto out_dqlock;
         mutex_lock(&dqopt->dqio_mutex);
-        if (dqopt->ops[dquot->dq_type]->release_dqblk) {
-                ret = dqopt->ops[dquot->dq_type]->release_dqblk(dquot);
+        if (dqopt->ops[dquot->dq_id.type]->release_dqblk) {
+                ret = dqopt->ops[dquot->dq_id.type]->release_dqblk(dquot);
                 /* Write the info */
-                if (info_dirty(&dqopt->info[dquot->dq_type])) {
-                        ret2 = dqopt->ops[dquot->dq_type]->write_file_info(
-                                                dquot->dq_sb, dquot->dq_type);
+                if (info_dirty(&dqopt->info[dquot->dq_id.type])) {
+                        ret2 = dqopt->ops[dquot->dq_id.type]->write_file_info(
+                                                dquot->dq_sb, dquot->dq_id.type);
                 }
                 if (ret >= 0)
                         ret = ret2;
@@ -521,7 +521,7 @@ restart:
         list_for_each_entry_safe(dquot, tmp, &inuse_list, dq_inuse) {
                 if (dquot->dq_sb != sb)
                         continue;
-                if (dquot->dq_type != type)
+                if (dquot->dq_id.type != type)
                         continue;
                 /* Wait for dquot users */
                 if (atomic_read(&dquot->dq_count)) {
@@ -741,7 +741,8 @@ void dqput(struct dquot *dquot)
 #ifdef CONFIG_QUOTA_DEBUG
         if (!atomic_read(&dquot->dq_count)) {
                 quota_error(dquot->dq_sb, "trying to free free dquot of %s %d",
-                            quotatypes[dquot->dq_type], dquot->dq_id);
+                            quotatypes[dquot->dq_id.type],
+                            from_kqid(&init_user_ns, dquot->dq_id));
                 BUG();
         }
 #endif
@@ -752,7 +753,7 @@ we_slept:
                 /* We have more than one user... nothing to do */
                 atomic_dec(&dquot->dq_count);
                 /* Releasing dquot during quotaoff phase? */
-                if (!sb_has_quota_active(dquot->dq_sb, dquot->dq_type) &&
+                if (!sb_has_quota_active(dquot->dq_sb, dquot->dq_id.type) &&
                     atomic_read(&dquot->dq_count) == 1)
                         wake_up(&dquot->dq_wait_unused);
                 spin_unlock(&dq_list_lock);
@@ -815,7 +816,7 @@ static struct dquot *get_empty_dquot(struct super_block *sb, int type)
         INIT_LIST_HEAD(&dquot->dq_dirty);
         init_waitqueue_head(&dquot->dq_wait_unused);
         dquot->dq_sb = sb;
-        dquot->dq_type = type;
+        dquot->dq_id.type = type;
         atomic_set(&dquot->dq_count, 1);
 
         return dquot;
@@ -859,7 +860,7 @@ we_slept:
                 }
                 dquot = empty;
                 empty = NULL;
-                dquot->dq_id = id;
+                dquot->dq_id = qid;
                 /* all dquots go on the inuse_list */
                 put_inuse(dquot);
                 /* hash it first so it can be found */
@@ -1219,8 +1220,8 @@ static void prepare_warning(struct dquot_warn *warn, struct dquot *dquot,
                 return;
         warn->w_type = warntype;
         warn->w_sb = dquot->dq_sb;
-        warn->w_dq_id = dquot->dq_id;
-        warn->w_dq_type = dquot->dq_type;
+        warn->w_dq_id = from_kqid(&init_user_ns, dquot->dq_id);
+        warn->w_dq_type = dquot->dq_id.type;
 }
 
 /*
@@ -1245,7 +1246,7 @@ static void flush_warnings(struct dquot_warn *warn)
 
 static int ignore_hardlimit(struct dquot *dquot)
 {
-        struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_type];
+        struct mem_dqinfo *info = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
 
         return capable(CAP_SYS_RESOURCE) &&
                (info->dqi_format->qf_fmt_id != QFMT_VFS_OLD ||
@@ -1258,7 +1259,7 @@ static int check_idq(struct dquot *dquot, qsize_t inodes,
 {
         qsize_t newinodes = dquot->dq_dqb.dqb_curinodes + inodes;
 
-        if (!sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_type) ||
+        if (!sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_id.type) ||
             test_bit(DQ_FAKE_B, &dquot->dq_flags))
                 return 0;
 
@@ -1283,7 +1284,7 @@ static int check_idq(struct dquot *dquot, qsize_t inodes,
             dquot->dq_dqb.dqb_itime == 0) {
                 prepare_warning(warn, dquot, QUOTA_NL_ISOFTWARN);
                 dquot->dq_dqb.dqb_itime = get_seconds() +
-                    sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_igrace;
+                    sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type].dqi_igrace;
         }
 
         return 0;
@@ -1296,7 +1297,7 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc,
         qsize_t tspace;
         struct super_block *sb = dquot->dq_sb;
 
-        if (!sb_has_quota_limits_enabled(sb, dquot->dq_type) ||
+        if (!sb_has_quota_limits_enabled(sb, dquot->dq_id.type) ||
             test_bit(DQ_FAKE_B, &dquot->dq_flags))
                 return 0;
 
@@ -1327,7 +1328,7 @@ static int check_bdq(struct dquot *dquot, qsize_t space, int prealloc,
                 if (!prealloc) {
                         prepare_warning(warn, dquot, QUOTA_NL_BSOFTWARN);
                         dquot->dq_dqb.dqb_btime = get_seconds() +
-                            sb_dqopt(sb)->info[dquot->dq_type].dqi_bgrace;
+                            sb_dqopt(sb)->info[dquot->dq_id.type].dqi_bgrace;
                 }
                 else
                         /*
@@ -1346,7 +1347,7 @@ static int info_idq_free(struct dquot *dquot, qsize_t inodes)
 
         if (test_bit(DQ_FAKE_B, &dquot->dq_flags) ||
             dquot->dq_dqb.dqb_curinodes <= dquot->dq_dqb.dqb_isoftlimit ||
-            !sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_type))
+            !sb_has_quota_limits_enabled(dquot->dq_sb, dquot->dq_id.type))
                 return QUOTA_NL_NOWARN;
 
         newinodes = dquot->dq_dqb.dqb_curinodes - inodes;
@@ -2362,9 +2363,9 @@ static void do_get_dqblk(struct dquot *dquot, struct fs_disk_quota *di)
 
         memset(di, 0, sizeof(*di));
         di->d_version = FS_DQUOT_VERSION;
-        di->d_flags = dquot->dq_type == USRQUOTA ?
+        di->d_flags = dquot->dq_id.type == USRQUOTA ?
                         FS_USER_QUOTA : FS_GROUP_QUOTA;
-        di->d_id = dquot->dq_id;
+        di->d_id = from_kqid_munged(current_user_ns(), dquot->dq_id);
 
         spin_lock(&dq_data_lock);
         di->d_blk_hardlimit = stoqb(dm->dqb_bhardlimit);
@@ -2403,7 +2404,7 @@ 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];
+        struct mem_dqinfo *dqi = &sb_dqopt(dquot->dq_sb)->info[dquot->dq_id.type];
 
         if (di->d_fieldmask & ~VFS_FS_DQ_MASK)
                 return -EINVAL;
diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
index e41c1becf096..d65877fbe8f4 100644
--- a/fs/quota/quota_tree.c
+++ b/fs/quota/quota_tree.c
@@ -22,9 +22,10 @@ MODULE_LICENSE("GPL");
 
 #define __QUOTA_QT_PARANOIA
 
-static int get_index(struct qtree_mem_dqinfo *info, qid_t id, int depth)
+static int get_index(struct qtree_mem_dqinfo *info, struct kqid qid, int depth)
 {
         unsigned int epb = info->dqi_usable_bs >> 2;
+        qid_t id = from_kqid(&init_user_ns, qid);
 
         depth = info->dqi_qtree_depth - depth - 1;
         while (depth--)
@@ -244,7 +245,7 @@ static uint find_free_dqentry(struct qtree_mem_dqinfo *info,
                 /* This is enough as the block is already zeroed and the entry
                  * list is empty... */
                 info->dqi_free_entry = blk;
-                mark_info_dirty(dquot->dq_sb, dquot->dq_type);
+                mark_info_dirty(dquot->dq_sb, dquot->dq_id.type);
         }
         /* Block will be full? */
         if (le16_to_cpu(dh->dqdh_entries) + 1 >= qtree_dqstr_in_blk(info)) {
@@ -357,7 +358,7 @@ static inline int dq_insert_tree(struct qtree_mem_dqinfo *info,
  */
 int qtree_write_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
 {
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct super_block *sb = dquot->dq_sb;
         ssize_t ret;
         char *ddquot = getdqbuf(info->dqi_entry_size);
@@ -538,8 +539,9 @@ static loff_t find_block_dqentry(struct qtree_mem_dqinfo *info,
                 ddquot += info->dqi_entry_size;
         }
         if (i == qtree_dqstr_in_blk(info)) {
-                quota_error(dquot->dq_sb, "Quota for id %u referenced "
-                            "but not present", dquot->dq_id);
+                quota_error(dquot->dq_sb,
+                            "Quota for id %u referenced but not present",
+                            from_kqid(&init_user_ns, dquot->dq_id));
                 ret = -EIO;
                 goto out_buf;
         } else {
@@ -589,7 +591,7 @@ static inline loff_t find_dqentry(struct qtree_mem_dqinfo *info,
 
 int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
 {
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct super_block *sb = dquot->dq_sb;
         loff_t offset;
         char *ddquot;
@@ -607,8 +609,10 @@ int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
                 offset = find_dqentry(info, dquot);
                 if (offset <= 0) {      /* Entry not present? */
                         if (offset < 0)
-                                quota_error(sb, "Can't read quota structure "
-                                            "for id %u", dquot->dq_id);
+                                quota_error(sb,"Can't read quota structure "
+                                            "for id %u",
+                                            from_kqid(&init_user_ns,
+                                                      dquot->dq_id));
                         dquot->dq_off = 0;
                         set_bit(DQ_FAKE_B, &dquot->dq_flags);
                         memset(&dquot->dq_dqb, 0, sizeof(struct mem_dqblk));
@@ -626,7 +630,7 @@ int qtree_read_dquot(struct qtree_mem_dqinfo *info, struct dquot *dquot)
                 if (ret >= 0)
                         ret = -EIO;
                 quota_error(sb, "Error while reading quota structure for id %u",
-                            dquot->dq_id);
+                            from_kqid(&init_user_ns, dquot->dq_id));
                 set_bit(DQ_FAKE_B, &dquot->dq_flags);
                 memset(&dquot->dq_dqb, 0, sizeof(struct mem_dqblk));
                 kfree(ddquot);
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c
index 34b37a67bb16..469c6848b322 100644
--- a/fs/quota/quota_v1.c
+++ b/fs/quota/quota_v1.c
@@ -54,7 +54,7 @@ static void v1_mem2disk_dqblk(struct v1_disk_dqblk *d, struct mem_dqblk *m)
 
 static int v1_read_dqblk(struct dquot *dquot)
 {
-        int type = dquot->dq_type;
+        int type = dquot->dq_id.type;
         struct v1_disk_dqblk dqblk;
 
         if (!sb_dqopt(dquot->dq_sb)->files[type])
@@ -63,7 +63,8 @@ static int v1_read_dqblk(struct dquot *dquot)
         /* Set structure to 0s in case read fails/is after end of file */
         memset(&dqblk, 0, sizeof(struct v1_disk_dqblk));
         dquot->dq_sb->s_op->quota_read(dquot->dq_sb, type, (char *)&dqblk,
-                        sizeof(struct v1_disk_dqblk), v1_dqoff(dquot->dq_id));
+                        sizeof(struct v1_disk_dqblk),
+                        v1_dqoff(from_kqid(&init_user_ns, dquot->dq_id)));
 
         v1_disk2mem_dqblk(&dquot->dq_dqb, &dqblk);
         if (dquot->dq_dqb.dqb_bhardlimit == 0 &&
@@ -78,12 +79,13 @@ static int v1_read_dqblk(struct dquot *dquot)
 
 static int v1_commit_dqblk(struct dquot *dquot)
 {
-        short type = dquot->dq_type;
+        short type = dquot->dq_id.type;
         ssize_t ret;
         struct v1_disk_dqblk dqblk;
 
         v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
-        if (dquot->dq_id == 0) {
+        if (((type == USRQUOTA) && uid_eq(dquot->dq_id.uid, GLOBAL_ROOT_UID)) ||
+            ((type == GRPQUOTA) && gid_eq(dquot->dq_id.gid, GLOBAL_ROOT_GID))) {
                 dqblk.dqb_btime =
                         sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
                 dqblk.dqb_itime =
@@ -93,7 +95,7 @@ static int v1_commit_dqblk(struct dquot *dquot)
         if (sb_dqopt(dquot->dq_sb)->files[type])
                 ret = dquot->dq_sb->s_op->quota_write(dquot->dq_sb, type,
                         (char *)&dqblk, sizeof(struct v1_disk_dqblk),
-                        v1_dqoff(dquot->dq_id));
+                        v1_dqoff(from_kqid(&init_user_ns, dquot->dq_id)));
         if (ret != sizeof(struct v1_disk_dqblk)) {
                 quota_error(dquot->dq_sb, "dquota write failed");
                 if (ret >= 0)
diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index f1ab3604db5a..02751ec695c5 100644
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -196,7 +196,7 @@ static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot)
         struct v2r0_disk_dqblk *d = dp;
         struct mem_dqblk *m = &dquot->dq_dqb;
         struct qtree_mem_dqinfo *info =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
 
         d->dqb_ihardlimit = cpu_to_le32(m->dqb_ihardlimit);
         d->dqb_isoftlimit = cpu_to_le32(m->dqb_isoftlimit);
@@ -206,7 +206,7 @@ static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot)
         d->dqb_bsoftlimit = cpu_to_le32(v2_stoqb(m->dqb_bsoftlimit));
         d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
         d->dqb_btime = cpu_to_le64(m->dqb_btime);
-        d->dqb_id = cpu_to_le32(dquot->dq_id);
+        d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
         if (qtree_entry_unused(info, dp))
                 d->dqb_itime = cpu_to_le64(1);
 }
@@ -215,11 +215,13 @@ static int v2r0_is_id(void *dp, struct dquot *dquot)
 {
         struct v2r0_disk_dqblk *d = dp;
         struct qtree_mem_dqinfo *info =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
 
         if (qtree_entry_unused(info, dp))
                 return 0;
-        return le32_to_cpu(d->dqb_id) == dquot->dq_id;
+        return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
+                                le32_to_cpu(d->dqb_id)),
+                      dquot->dq_id);
 }
 
 static void v2r1_disk2memdqb(struct dquot *dquot, void *dp)
@@ -247,7 +249,7 @@ static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot)
         struct v2r1_disk_dqblk *d = dp;
         struct mem_dqblk *m = &dquot->dq_dqb;
         struct qtree_mem_dqinfo *info =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
 
         d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
         d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
@@ -257,7 +259,7 @@ static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot)
         d->dqb_bsoftlimit = cpu_to_le64(v2_stoqb(m->dqb_bsoftlimit));
         d->dqb_curspace = cpu_to_le64(m->dqb_curspace);
         d->dqb_btime = cpu_to_le64(m->dqb_btime);
-        d->dqb_id = cpu_to_le32(dquot->dq_id);
+        d->dqb_id = cpu_to_le32(from_kqid(&init_user_ns, dquot->dq_id));
         if (qtree_entry_unused(info, dp))
                 d->dqb_itime = cpu_to_le64(1);
 }
@@ -266,26 +268,28 @@ static int v2r1_is_id(void *dp, struct dquot *dquot)
 {
         struct v2r1_disk_dqblk *d = dp;
         struct qtree_mem_dqinfo *info =
-                        sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
+                        sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv;
 
         if (qtree_entry_unused(info, dp))
                 return 0;
-        return le32_to_cpu(d->dqb_id) == dquot->dq_id;
+        return qid_eq(make_kqid(&init_user_ns, dquot->dq_id.type,
+                                le32_to_cpu(d->dqb_id)),
+                      dquot->dq_id);
 }
 
 static int v2_read_dquot(struct dquot *dquot)
 {
-        return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
+        return qtree_read_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
 }
 
 static int v2_write_dquot(struct dquot *dquot)
 {
-        return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
+        return qtree_write_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
 }
 
 static int v2_release_dquot(struct dquot *dquot)
 {
-        return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv, dquot);
+        return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
 }
 
 static int v2_free_file_info(struct super_block *sb, int type)
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 8b2760427252..dcd5721e626d 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -419,10 +419,9 @@ struct dquot {
         atomic_t dq_count;              /* Use count */
         wait_queue_head_t dq_wait_unused;       /* Wait queue for dquot to become unused */
         struct super_block *dq_sb;      /* superblock this applies to */
-        unsigned int dq_id;             /* ID this applies to (uid, gid) */
+        struct kqid dq_id;              /* ID this applies to (uid, gid, projid) */
         loff_t dq_off;                  /* Offset of dquot on disk */
         unsigned long dq_flags;         /* See DQ_* */
-        short dq_type;                  /* Type of quota */
         struct mem_dqblk dq_dqb;        /* Diskquota usage */
 };