zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/brel_ma.c b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/brel_ma.c
new file mode 100644
index 0000000..a12afae
--- /dev/null
+++ b/ap/app/e2fsprogs/e2fsprogs-1.42.9/lib/ext2fs/brel_ma.c
@@ -0,0 +1,199 @@
+/*
+ * brel_ma.c
+ *
+ * Copyright (C) 1996, 1997 Theodore Ts'o.
+ *
+ * TODO: rewrite to not use a direct array!!! (Fortunately this
+ * module isn't really used yet.)
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#if HAVE_ERRNO_H
+#include <errno.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fs.h"
+#include "brel.h"
+
+static errcode_t bma_put(ext2_brel brel, blk64_t old,
+ struct ext2_block_relocate_entry *ent);
+static errcode_t bma_get(ext2_brel brel, blk64_t old,
+ struct ext2_block_relocate_entry *ent);
+static errcode_t bma_start_iter(ext2_brel brel);
+static errcode_t bma_next(ext2_brel brel, blk64_t *old,
+ struct ext2_block_relocate_entry *ent);
+static errcode_t bma_move(ext2_brel brel, blk64_t old, blk64_t new);
+static errcode_t bma_delete(ext2_brel brel, blk64_t old);
+static errcode_t bma_free(ext2_brel brel);
+
+struct brel_ma {
+ __u32 magic;
+ blk64_t max_block;
+ struct ext2_block_relocate_entry *entries;
+};
+
+errcode_t ext2fs_brel_memarray_create(char *name, blk64_t max_block,
+ ext2_brel *new_brel)
+{
+ ext2_brel brel = 0;
+ errcode_t retval;
+ struct brel_ma *ma = 0;
+ size_t size;
+
+ *new_brel = 0;
+
+ /*
+ * Allocate memory structures
+ */
+ retval = ext2fs_get_mem(sizeof(struct ext2_block_relocation_table),
+ &brel);
+ if (retval)
+ goto errout;
+ memset(brel, 0, sizeof(struct ext2_block_relocation_table));
+
+ retval = ext2fs_get_mem(strlen(name)+1, &brel->name);
+ if (retval)
+ goto errout;
+ strcpy(brel->name, name);
+
+ retval = ext2fs_get_mem(sizeof(struct brel_ma), &ma);
+ if (retval)
+ goto errout;
+ memset(ma, 0, sizeof(struct brel_ma));
+ brel->priv_data = ma;
+
+ size = (size_t) (sizeof(struct ext2_block_relocate_entry) *
+ (max_block+1));
+ retval = ext2fs_get_array(max_block+1,
+ sizeof(struct ext2_block_relocate_entry), &ma->entries);
+ if (retval)
+ goto errout;
+ memset(ma->entries, 0, size);
+ ma->max_block = max_block;
+
+ /*
+ * Fill in the brel data structure
+ */
+ brel->put = bma_put;
+ brel->get = bma_get;
+ brel->start_iter = bma_start_iter;
+ brel->next = bma_next;
+ brel->move = bma_move;
+ brel->delete = bma_delete;
+ brel->free = bma_free;
+
+ *new_brel = brel;
+ return 0;
+
+errout:
+ bma_free(brel);
+ return retval;
+}
+
+static errcode_t bma_put(ext2_brel brel, blk64_t old,
+ struct ext2_block_relocate_entry *ent)
+{
+ struct brel_ma *ma;
+
+ ma = brel->priv_data;
+ if (old > ma->max_block)
+ return EXT2_ET_INVALID_ARGUMENT;
+ ma->entries[(unsigned)old] = *ent;
+ return 0;
+}
+
+static errcode_t bma_get(ext2_brel brel, blk64_t old,
+ struct ext2_block_relocate_entry *ent)
+{
+ struct brel_ma *ma;
+
+ ma = brel->priv_data;
+ if (old > ma->max_block)
+ return EXT2_ET_INVALID_ARGUMENT;
+ if (ma->entries[(unsigned)old].new == 0)
+ return ENOENT;
+ *ent = ma->entries[old];
+ return 0;
+}
+
+static errcode_t bma_start_iter(ext2_brel brel)
+{
+ brel->current = 0;
+ return 0;
+}
+
+static errcode_t bma_next(ext2_brel brel, blk64_t *old,
+ struct ext2_block_relocate_entry *ent)
+{
+ struct brel_ma *ma;
+
+ ma = brel->priv_data;
+ while (++brel->current < ma->max_block) {
+ if (ma->entries[(unsigned)brel->current].new == 0)
+ continue;
+ *old = brel->current;
+ *ent = ma->entries[(unsigned)brel->current];
+ return 0;
+ }
+ *old = 0;
+ return 0;
+}
+
+static errcode_t bma_move(ext2_brel brel, blk64_t old, blk64_t new)
+{
+ struct brel_ma *ma;
+
+ ma = brel->priv_data;
+ if ((old > ma->max_block) || (new > ma->max_block))
+ return EXT2_ET_INVALID_ARGUMENT;
+ if (ma->entries[(unsigned)old].new == 0)
+ return ENOENT;
+ ma->entries[(unsigned)new] = ma->entries[old];
+ ma->entries[(unsigned)old].new = 0;
+ return 0;
+}
+
+static errcode_t bma_delete(ext2_brel brel, blk64_t old)
+{
+ struct brel_ma *ma;
+
+ ma = brel->priv_data;
+ if (old > ma->max_block)
+ return EXT2_ET_INVALID_ARGUMENT;
+ if (ma->entries[(unsigned)old].new == 0)
+ return ENOENT;
+ ma->entries[(unsigned)old].new = 0;
+ return 0;
+}
+
+static errcode_t bma_free(ext2_brel brel)
+{
+ struct brel_ma *ma;
+
+ if (!brel)
+ return 0;
+
+ ma = brel->priv_data;
+
+ if (ma) {
+ if (ma->entries)
+ ext2fs_free_mem(&ma->entries);
+ ext2fs_free_mem(&ma);
+ }
+ if (brel->name)
+ ext2fs_free_mem(&brel->name);
+ ext2fs_free_mem(&brel);
+ return 0;
+}