land b1_5 onto HEAD

[fs/lustre-release.git] / lustre / ldiskfs / lustre_quota_fmt.h

diff --git a/lustre/ldiskfs/lustre_quota_fmt.h b/lustre/ldiskfs/lustre_quota_fmt.h
new file mode 100644 (file)
index 0000000..28f5c15
--- /dev/null
+++ b/lustre/ldiskfs/lustre_quota_fmt.h
@@ -0,0 +1,84 @@
+/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
+ * vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * Lustre administrative quota format
+ *
+ * from
+ * include/linux/quotaio_v2.h
+ */
+#ifndef _LUSTRE_QUOTA_FMT_H
+#define _LUSTRE_QUOTA_FMT_H
+
+#include <linux/types.h>
+#include <linux/quota.h>
+
+/*
+ * Definitions of magics and versions of current quota files
+ * Same with quota v2's magic
+ */
+#define LUSTRE_INITQMAGICS {\
+       0xd9c01f11,     /* USRQUOTA */\
+       0xd9c01927      /* GRPQUOTA */\
+}
+
+#define LUSTRE_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 lustre_disk_dqblk {
+        __u32 dqb_id;           /* id this quota applies to */
+        __u32 dqb_ihardlimit;   /* absolute limit on allocated inodes */
+        __u32 dqb_isoftlimit;   /* preferred inode limit */
+        __u32 dqb_curinodes;    /* current # allocated inodes */
+        __u32 dqb_bhardlimit;   /* absolute limit on disk space (in QUOTABLOCK_SIZE) */
+        __u32 dqb_bsoftlimit;   /* preferred limit on disk space (in QUOTABLOCK_SIZE) */
+        __u64 dqb_curspace;     /* current space occupied (in bytes) */
+        __u64 dqb_btime;        /* time limit for excessive disk use */
+        __u64 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 lustre_disk_dqheader {
+        __u32 dqh_magic;        /* Magic number identifying file */
+        __u32 dqh_version;      /* File version */
+};
+
+/* Header with type and version specific information */
+struct lustre_disk_dqinfo {
+        __u32 dqi_bgrace;       /* Time before block soft limit becomes hard limit */
+        __u32 dqi_igrace;       /* Time before inode soft limit becomes hard limit */
+        __u32 dqi_flags;        /* Flags for quotafile (DQF_*) */
+        __u32 dqi_blocks;       /* Number of blocks in file */
+        __u32 dqi_free_blk;     /* Number of first free block in the list */
+        __u32 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 lustre_disk_dqdbheader {
+        __u32 dqdh_next_free;   /* Number of next block with free entry */
+        __u32 dqdh_prev_free;   /* Number of previous block with free entry */
+        __u16 dqdh_entries;     /* Number of valid entries in block */
+        __u16 dqdh_pad1;
+        __u32 dqdh_pad2;
+};
+
+#define LUSTRE_DQINFOOFF       sizeof(struct lustre_disk_dqheader)     /* Offset of info header in file */
+#define LUSTRE_DQBLKSIZE_BITS  10
+#define LUSTRE_DQBLKSIZE       (1 << LUSTRE_DQBLKSIZE_BITS)    /* Size of block with quota structures */
+#define LUSTRE_DQTREEOFF       1       /* Offset of tree in file in blocks */
+#define LUSTRE_DQTREEDEPTH     4       /* Depth of quota tree */
+#define LUSTRE_DQSTRINBLK      ((LUSTRE_DQBLKSIZE - sizeof(struct lustre_disk_dqdbheader)) / sizeof(struct lustre_disk_dqblk)) /* Number of entries in one blocks */
+
+#endif                          /* lustre_quota_fmt.h */