Initial commit to Gerrittizen/20120530.11.0_branch1.0

1 files changed, 51 insertions, 0 deletions

diff --git a/quota_tree.h b/quota_tree.h
new file mode 100644
index 0000000..32fce65
--- /dev/null
+++ b/quota_tree.h
@@ -0,0 +1,51 @@
+#ifndef GUARD_QUOTA_TREE_H
+#define GUARD_QUOTA_TREE_H
+
+#include <sys/types.h>
+#include "quota.h"
+
+#define QT_TREEOFF	1	/* Offset of tree in file in blocks */
+#define QT_TREEDEPTH	4	/* Depth of quota tree */
+#define QT_BLKSIZE_BITS	10
+#define QT_BLKSIZE (1 << QT_BLKSIZE_BITS)	/* Size of block with quota structures */
+
+/*
+ *  Structure of header of block with quota structures. It is padded to 16 bytes so
+ *  there will be space for exactly 18 quota-entries in a block
+ */
+struct qt_disk_dqdbheader {
+	u_int32_t dqdh_next_free;	/* Number of next block with free entry */
+	u_int32_t dqdh_prev_free;	/* Number of previous block with free entry */
+	u_int16_t dqdh_entries;	/* Number of valid entries in block */
+	u_int16_t dqdh_pad1;
+	u_int32_t dqdh_pad2;
+} __attribute__ ((packed));
+
+struct dquot;
+struct quota_handle;
+
+/* Operations */
+struct qtree_fmt_operations {
+	void (*mem2disk_dqblk)(void *disk, struct dquot *dquot);	/* Convert given entry from in memory format to disk one */
+	void (*disk2mem_dqblk)(struct dquot *dquot, void *disk);	/* Convert given entry from disk format to in memory one */
+	int (*is_id)(void *disk, struct dquot *dquot);	/* Is this structure for given id? */
+};
+
+/* Inmemory copy of version specific information */
+struct qtree_mem_dqinfo {
+	unsigned int dqi_blocks;	/* # of blocks in quota file */
+	unsigned int dqi_free_blk;	/* First block in list of free blocks */
+	unsigned int dqi_free_entry;	/* First block with free entry */
+	unsigned int dqi_entry_size;	/* Size of quota entry in quota file */
+	struct qtree_fmt_operations *dqi_ops;	/* Operations for entry manipulation */
+};
+
+void qtree_write_dquot(struct dquot *dquot);
+struct dquot *qtree_read_dquot(struct quota_handle *h, qid_t id);
+void qtree_delete_dquot(struct dquot *dquot);
+int qtree_entry_unused(struct qtree_mem_dqinfo *info, char *disk);
+int qtree_scan_dquots(struct quota_handle *h, int (*process_dquot) (struct dquot *, char *));
+
+int qtree_dqstr_in_blk(struct qtree_mem_dqinfo *info);
+
+#endif