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-rw-r--r--e2fslib/irel.h114
1 files changed, 114 insertions, 0 deletions
diff --git a/e2fslib/irel.h b/e2fslib/irel.h
new file mode 100644
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--- /dev/null
+++ b/e2fslib/irel.h
@@ -0,0 +1,114 @@
+/*
+ * irel.h
+ *
+ * Copyright (C) 1996, 1997 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+struct ext2_inode_reference {
+ blk_t block;
+ __u16 offset;
+};
+
+struct ext2_inode_relocate_entry {
+ ext2_ino_t new;
+ ext2_ino_t orig;
+ __u16 flags;
+ __u16 max_refs;
+};
+
+typedef struct ext2_inode_relocation_table *ext2_irel;
+
+struct ext2_inode_relocation_table {
+ __u32 magic;
+ char *name;
+ ext2_ino_t current;
+ void *priv_data;
+
+ /*
+ * Add an inode relocation entry.
+ */
+ errcode_t (*put)(ext2_irel irel, ext2_ino_t old,
+ struct ext2_inode_relocate_entry *ent);
+ /*
+ * Get an inode relocation entry.
+ */
+ errcode_t (*get)(ext2_irel irel, ext2_ino_t old,
+ struct ext2_inode_relocate_entry *ent);
+
+ /*
+ * Get an inode relocation entry by its original inode number
+ */
+ errcode_t (*get_by_orig)(ext2_irel irel, ext2_ino_t orig, ext2_ino_t *old,
+ struct ext2_inode_relocate_entry *ent);
+
+ /*
+ * Initialize for iterating over the inode relocation entries.
+ */
+ errcode_t (*start_iter)(ext2_irel irel);
+
+ /*
+ * The iterator function for the inode relocation entries.
+ * Returns an inode number of 0 when out of entries.
+ */
+ errcode_t (*next)(ext2_irel irel, ext2_ino_t *old,
+ struct ext2_inode_relocate_entry *ent);
+
+ /*
+ * Add an inode reference (i.e., note the fact that a
+ * particular block/offset contains a reference to an inode)
+ */
+ errcode_t (*add_ref)(ext2_irel irel, ext2_ino_t ino,
+ struct ext2_inode_reference *ref);
+
+ /*
+ * Initialize for iterating over the inode references for a
+ * particular inode.
+ */
+ errcode_t (*start_iter_ref)(ext2_irel irel, ext2_ino_t ino);
+
+ /*
+ * The iterator function for the inode references for an
+ * inode. The references for only one inode can be interator
+ * over at a time, as the iterator state is stored in ext2_irel.
+ */
+ errcode_t (*next_ref)(ext2_irel irel,
+ struct ext2_inode_reference *ref);
+
+ /*
+ * Move the inode relocation table from one inode number to
+ * another. Note that the inode references also must move.
+ */
+ errcode_t (*move)(ext2_irel irel, ext2_ino_t old, ext2_ino_t new);
+
+ /*
+ * Remove an inode relocation entry, along with all of the
+ * inode references.
+ */
+ errcode_t (*delete)(ext2_irel irel, ext2_ino_t old);
+
+ /*
+ * Free the inode relocation table.
+ */
+ errcode_t (*free)(ext2_irel irel);
+};
+
+errcode_t ext2fs_irel_memarray_create(char *name, ext2_ino_t max_inode,
+ ext2_irel *irel);
+
+#define ext2fs_irel_put(irel, old, ent) ((irel)->put((irel), old, ent))
+#define ext2fs_irel_get(irel, old, ent) ((irel)->get((irel), old, ent))
+#define ext2fs_irel_get_by_orig(irel, orig, old, ent) \
+ ((irel)->get_by_orig((irel), orig, old, ent))
+#define ext2fs_irel_start_iter(irel) ((irel)->start_iter((irel)))
+#define ext2fs_irel_next(irel, old, ent) ((irel)->next((irel), old, ent))
+#define ext2fs_irel_add_ref(irel, ino, ref) ((irel)->add_ref((irel), ino, ref))
+#define ext2fs_irel_start_iter_ref(irel, ino) ((irel)->start_iter_ref((irel), ino))
+#define ext2fs_irel_next_ref(irel, ref) ((irel)->next_ref((irel), ref))
+#define ext2fs_irel_move(irel, old, new) ((irel)->move((irel), old, new))
+#define ext2fs_irel_delete(irel, old) ((irel)->delete((irel), old))
+#define ext2fs_irel_free(irel) ((irel)->free((irel)))