1 files changed, 133 insertions, 34 deletions

diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index a5475fb1ae44..3dfc23e02135 100644
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -23,14 +23,23 @@ MODULE_LICENSE("GPL");
 
 #define __QUOTA_V2_PARANOIA
 
-static void v2_mem2diskdqb(void *dp, struct dquot *dquot);
-static void v2_disk2memdqb(struct dquot *dquot, void *dp);
-static int v2_is_id(void *dp, struct dquot *dquot);
-
-static struct qtree_fmt_operations v2_qtree_ops = {
-        .mem2disk_dqblk = v2_mem2diskdqb,
-        .disk2mem_dqblk = v2_disk2memdqb,
-        .is_id = v2_is_id,
+static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot);
+static void v2r0_disk2memdqb(struct dquot *dquot, void *dp);
+static int v2r0_is_id(void *dp, struct dquot *dquot);
+static void v2r1_mem2diskdqb(void *dp, struct dquot *dquot);
+static void v2r1_disk2memdqb(struct dquot *dquot, void *dp);
+static int v2r1_is_id(void *dp, struct dquot *dquot);
+
+static struct qtree_fmt_operations v2r0_qtree_ops = {
+        .mem2disk_dqblk = v2r0_mem2diskdqb,
+        .disk2mem_dqblk = v2r0_disk2memdqb,
+        .is_id = v2r0_is_id,
+};
+
+static struct qtree_fmt_operations v2r1_qtree_ops = {
+        .mem2disk_dqblk = v2r1_mem2diskdqb,
+        .disk2mem_dqblk = v2r1_disk2memdqb,
+        .is_id = v2r1_is_id,
 };
 
 #define QUOTABLOCK_BITS 10
@@ -46,23 +55,33 @@ static inline qsize_t v2_qbtos(qsize_t blocks)
         return blocks << QUOTABLOCK_BITS;
 }
 
+static int v2_read_header(struct super_block *sb, int type,
+                          struct v2_disk_dqheader *dqhead)
+{
+        ssize_t size;
+
+        size = sb->s_op->quota_read(sb, type, (char *)dqhead,
+                                    sizeof(struct v2_disk_dqheader), 0);
+        if (size != sizeof(struct v2_disk_dqheader)) {
+                printk(KERN_WARNING "quota_v2: Failed header read:"
+                       " expected=%zd got=%zd\n",
+                        sizeof(struct v2_disk_dqheader), size);
+                return 0;
+        }
+        return 1;
+}
+
 /* Check whether given file is really vfsv0 quotafile */
 static int v2_check_quota_file(struct super_block *sb, int type)
 {
         struct v2_disk_dqheader dqhead;
-        ssize_t size;
         static const uint quota_magics[] = V2_INITQMAGICS;
         static const uint quota_versions[] = V2_INITQVERSIONS;
  
-        size = sb->s_op->quota_read(sb, type, (char *)&dqhead,
-                                    sizeof(struct v2_disk_dqheader), 0);
-        if (size != sizeof(struct v2_disk_dqheader)) {
-                printk("quota_v2: failed read expected=%zd got=%zd\n",
-                        sizeof(struct v2_disk_dqheader), size);
+        if (!v2_read_header(sb, type, &dqhead))
                 return 0;
-        }
         if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
-            le32_to_cpu(dqhead.dqh_version) != quota_versions[type])
+            le32_to_cpu(dqhead.dqh_version) > quota_versions[type])
                 return 0;
         return 1;
 }
@@ -71,14 +90,20 @@ static int v2_check_quota_file(struct super_block *sb, int type)
 static int v2_read_file_info(struct super_block *sb, int type)
 {
         struct v2_disk_dqinfo dinfo;
+        struct v2_disk_dqheader dqhead;
         struct mem_dqinfo *info = sb_dqinfo(sb, type);
         struct qtree_mem_dqinfo *qinfo;
         ssize_t size;
+        unsigned int version;
+
+        if (!v2_read_header(sb, type, &dqhead))
+                return 0;
+        version = le32_to_cpu(dqhead.dqh_version);
 
         size = sb->s_op->quota_read(sb, type, (char *)&dinfo,
                sizeof(struct v2_disk_dqinfo), V2_DQINFOOFF);
         if (size != sizeof(struct v2_disk_dqinfo)) {
-                printk(KERN_WARNING "Can't read info structure on device %s.\n",
+                printk(KERN_WARNING "quota_v2: Can't read info structure on device %s.\n",
                         sb->s_id);
                 return -1;
         }
@@ -89,9 +114,15 @@ static int v2_read_file_info(struct super_block *sb, int type)
                 return -1;
         }
         qinfo = info->dqi_priv;
-        /* limits are stored as unsigned 32-bit data */
-        info->dqi_maxblimit = 0xffffffff;
-        info->dqi_maxilimit = 0xffffffff;
+        if (version == 0) {
+                /* limits are stored as unsigned 32-bit data */
+                info->dqi_maxblimit = 0xffffffff;
+                info->dqi_maxilimit = 0xffffffff;
+        } else {
+                /* used space is stored as unsigned 64-bit value */
+                info->dqi_maxblimit = 0xffffffffffffffff;       /* 2^64-1 */
+                info->dqi_maxilimit = 0xffffffffffffffff;
+        }
         info->dqi_bgrace = le32_to_cpu(dinfo.dqi_bgrace);
         info->dqi_igrace = le32_to_cpu(dinfo.dqi_igrace);
         info->dqi_flags = le32_to_cpu(dinfo.dqi_flags);
@@ -103,8 +134,13 @@ static int v2_read_file_info(struct super_block *sb, int type)
         qinfo->dqi_blocksize_bits = V2_DQBLKSIZE_BITS;
         qinfo->dqi_usable_bs = 1 << V2_DQBLKSIZE_BITS;
         qinfo->dqi_qtree_depth = qtree_depth(qinfo);
-        qinfo->dqi_entry_size = sizeof(struct v2_disk_dqblk);
-        qinfo->dqi_ops = &v2_qtree_ops;
+        if (version == 0) {
+                qinfo->dqi_entry_size = sizeof(struct v2r0_disk_dqblk);
+                qinfo->dqi_ops = &v2r0_qtree_ops;
+        } else {
+                qinfo->dqi_entry_size = sizeof(struct v2r1_disk_dqblk);
+                qinfo->dqi_ops = &v2r1_qtree_ops;
+        }
         return 0;
 }
 
@@ -135,9 +171,9 @@ static int v2_write_file_info(struct super_block *sb, int type)
         return 0;
 }
 
-static void v2_disk2memdqb(struct dquot *dquot, void *dp)
+static void v2r0_disk2memdqb(struct dquot *dquot, void *dp)
 {
-        struct v2_disk_dqblk *d = dp, empty;
+        struct v2r0_disk_dqblk *d = dp, empty;
         struct mem_dqblk *m = &dquot->dq_dqb;
 
         m->dqb_ihardlimit = le32_to_cpu(d->dqb_ihardlimit);
@@ -149,15 +185,15 @@ static void v2_disk2memdqb(struct dquot *dquot, void *dp)
         m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
         m->dqb_btime = le64_to_cpu(d->dqb_btime);
         /* We need to escape back all-zero structure */
-        memset(&empty, 0, sizeof(struct v2_disk_dqblk));
+        memset(&empty, 0, sizeof(struct v2r0_disk_dqblk));
         empty.dqb_itime = cpu_to_le64(1);
-        if (!memcmp(&empty, dp, sizeof(struct v2_disk_dqblk)))
+        if (!memcmp(&empty, dp, sizeof(struct v2r0_disk_dqblk)))
                 m->dqb_itime = 0;
 }
 
-static void v2_mem2diskdqb(void *dp, struct dquot *dquot)
+static void v2r0_mem2diskdqb(void *dp, struct dquot *dquot)
 {
-        struct v2_disk_dqblk *d = dp;
+        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;
@@ -175,9 +211,60 @@ static void v2_mem2diskdqb(void *dp, struct dquot *dquot)
                 d->dqb_itime = cpu_to_le64(1);
 }
 
-static int v2_is_id(void *dp, struct dquot *dquot)
+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;
+
+        if (qtree_entry_unused(info, dp))
+                return 0;
+        return le32_to_cpu(d->dqb_id) == dquot->dq_id;
+}
+
+static void v2r1_disk2memdqb(struct dquot *dquot, void *dp)
+{
+        struct v2r1_disk_dqblk *d = dp, empty;
+        struct mem_dqblk *m = &dquot->dq_dqb;
+
+        m->dqb_ihardlimit = le64_to_cpu(d->dqb_ihardlimit);
+        m->dqb_isoftlimit = le64_to_cpu(d->dqb_isoftlimit);
+        m->dqb_curinodes = le64_to_cpu(d->dqb_curinodes);
+        m->dqb_itime = le64_to_cpu(d->dqb_itime);
+        m->dqb_bhardlimit = v2_qbtos(le64_to_cpu(d->dqb_bhardlimit));
+        m->dqb_bsoftlimit = v2_qbtos(le64_to_cpu(d->dqb_bsoftlimit));
+        m->dqb_curspace = le64_to_cpu(d->dqb_curspace);
+        m->dqb_btime = le64_to_cpu(d->dqb_btime);
+        /* We need to escape back all-zero structure */
+        memset(&empty, 0, sizeof(struct v2r1_disk_dqblk));
+        empty.dqb_itime = cpu_to_le64(1);
+        if (!memcmp(&empty, dp, sizeof(struct v2r1_disk_dqblk)))
+                m->dqb_itime = 0;
+}
+
+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;
+
+        d->dqb_ihardlimit = cpu_to_le64(m->dqb_ihardlimit);
+        d->dqb_isoftlimit = cpu_to_le64(m->dqb_isoftlimit);
+        d->dqb_curinodes = cpu_to_le64(m->dqb_curinodes);
+        d->dqb_itime = cpu_to_le64(m->dqb_itime);
+        d->dqb_bhardlimit = cpu_to_le64(v2_stoqb(m->dqb_bhardlimit));
+        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);
+        if (qtree_entry_unused(info, dp))
+                d->dqb_itime = cpu_to_le64(1);
+}
+
+static int v2r1_is_id(void *dp, struct dquot *dquot)
 {
-        struct v2_disk_dqblk *d = dp;
+        struct v2r1_disk_dqblk *d = dp;
         struct qtree_mem_dqinfo *info =
                         sb_dqinfo(dquot->dq_sb, dquot->dq_type)->dqi_priv;
 
@@ -207,7 +294,7 @@ static int v2_free_file_info(struct super_block *sb, int type)
         return 0;
 }
 
-static struct quota_format_ops v2_format_ops = {
+static const struct quota_format_ops v2_format_ops = {
         .check_quota_file       = v2_check_quota_file,
         .read_file_info         = v2_read_file_info,
         .write_file_info        = v2_write_file_info,
@@ -217,20 +304,32 @@ static struct quota_format_ops v2_format_ops = {
         .release_dqblk          = v2_release_dquot,
 };
 
-static struct quota_format_type v2_quota_format = {
+static struct quota_format_type v2r0_quota_format = {
         .qf_fmt_id      = QFMT_VFS_V0,
         .qf_ops         = &v2_format_ops,
         .qf_owner       = THIS_MODULE
 };
 
+static struct quota_format_type v2r1_quota_format = {
+        .qf_fmt_id      = QFMT_VFS_V1,
+        .qf_ops         = &v2_format_ops,
+        .qf_owner       = THIS_MODULE
+};
+
 static int __init init_v2_quota_format(void)
 {
-        return register_quota_format(&v2_quota_format);
+        int ret;
+
+        ret = register_quota_format(&v2r0_quota_format);
+        if (ret)
+                return ret;
+        return register_quota_format(&v2r1_quota_format);
 }
 
 static void __exit exit_v2_quota_format(void)
 {
-        unregister_quota_format(&v2_quota_format);
+        unregister_quota_format(&v2r0_quota_format);
+        unregister_quota_format(&v2r1_quota_format);
 }
 
 module_init(init_v2_quota_format);