1 files changed, 79 insertions, 0 deletions

diff --git a/fs/quotaio_v2.h b/fs/quotaio_v2.h
new file mode 100644
index 000000000000..303d7cbe30d4
--- /dev/null
+++ b/fs/quotaio_v2.h
@@ -0,0 +1,79 @@
+/*
+ *      Definitions of structures for vfsv0 quota format
+ */
+
+#ifndef _LINUX_QUOTAIO_V2_H
+#define _LINUX_QUOTAIO_V2_H
+
+#include <linux/types.h>
+#include <linux/quota.h>
+
+/*
+ * Definitions of magics and versions of current quota files
+ */
+#define V2_INITQMAGICS {\
+        0xd9c01f11,     /* USRQUOTA */\
+        0xd9c01927      /* GRPQUOTA */\
+}
+
+#define V2_INITQVERSIONS {\
+        0,              /* USRQUOTA */\
+        0               /* GRPQUOTA */\
+}
+
+/*
+ * The following structure defines the format of the disk quota file
+ * (as it appears on disk) - the file is a radix tree whose leaves point
+ * to blocks of these structures.
+ */
+struct v2_disk_dqblk {
+        __le32 dqb_id;          /* id this quota applies to */
+        __le32 dqb_ihardlimit;  /* absolute limit on allocated inodes */
+        __le32 dqb_isoftlimit;  /* preferred inode limit */
+        __le32 dqb_curinodes;   /* current # allocated inodes */
+        __le32 dqb_bhardlimit;  /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
+        __le32 dqb_bsoftlimit;  /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
+        __le64 dqb_curspace;    /* current space occupied (in bytes) */
+        __le64 dqb_btime;       /* time limit for excessive disk use */
+        __le64 dqb_itime;       /* time limit for excessive inode use */
+};
+
+/*
+ * Here are header structures as written on disk and their in-memory copies
+ */
+/* First generic header */
+struct v2_disk_dqheader {
+        __le32 dqh_magic;       /* Magic number identifying file */
+        __le32 dqh_version;     /* File version */
+};
+
+/* Header with type and version specific information */
+struct v2_disk_dqinfo {
+        __le32 dqi_bgrace;      /* Time before block soft limit becomes hard limit */
+        __le32 dqi_igrace;      /* Time before inode soft limit becomes hard limit */
+        __le32 dqi_flags;       /* Flags for quotafile (DQF_*) */
+        __le32 dqi_blocks;      /* Number of blocks in file */
+        __le32 dqi_free_blk;    /* Number of first free block in the list */
+        __le32 dqi_free_entry;  /* Number of block with at least one free entry */
+};
+
+/*
+ *  Structure of header of block with quota structures. It is padded to 16 bytes so
+ *  there will be space for exactly 21 quota-entries in a block
+ */
+struct v2_disk_dqdbheader {
+        __le32 dqdh_next_free;  /* Number of next block with free entry */
+        __le32 dqdh_prev_free;  /* Number of previous block with free entry */
+        __le16 dqdh_entries;    /* Number of valid entries in block */
+        __le16 dqdh_pad1;
+        __le32 dqdh_pad2;
+};
+
+#define V2_DQINFOOFF    sizeof(struct v2_disk_dqheader) /* Offset of info header in file */
+#define V2_DQBLKSIZE_BITS       10
+#define V2_DQBLKSIZE    (1 << V2_DQBLKSIZE_BITS)        /* Size of block with quota structures */
+#define V2_DQTREEOFF    1               /* Offset of tree in file in blocks */
+#define V2_DQTREEDEPTH  4               /* Depth of quota tree */
+#define V2_DQSTRINBLK   ((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk))     /* Number of entries in one blocks */
+
+#endif /* _LINUX_QUOTAIO_V2_H */