diff options
Diffstat (limited to 'e2fsprogs/ext2fs/sparse.c')
-rw-r--r-- | e2fsprogs/ext2fs/sparse.c | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/e2fsprogs/ext2fs/sparse.c b/e2fsprogs/ext2fs/sparse.c deleted file mode 100644 index b3d3071..0000000 --- a/e2fsprogs/ext2fs/sparse.c +++ /dev/null @@ -1,79 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * sparse.c --- find the groups in an ext2 filesystem with metadata backups - * - * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. - * Copyright (C) 2002 Andreas Dilger. - * - * %Begin-Header% - * This file may be redistributed under the terms of the GNU Public - * License. - * %End-Header% - */ - -#include <stdio.h> - -#include "ext2_fs.h" -#include "ext2fsP.h" - -static int test_root(int a, int b) -{ - if (a == 0) - return 1; - while (1) { - if (a == 1) - return 1; - if (a % b) - return 0; - a = a / b; - } -} - -int ext2fs_bg_has_super(ext2_filsys fs, int group_block) -{ - if (!(fs->super->s_feature_ro_compat & - EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) - return 1; - - if (test_root(group_block, 3) || (test_root(group_block, 5)) || - test_root(group_block, 7)) - return 1; - - return 0; -} - -/* - * Iterate through the groups which hold BACKUP superblock/GDT copies in an - * ext3 filesystem. The counters should be initialized to 1, 5, and 7 before - * calling this for the first time. In a sparse filesystem it will be the - * sequence of powers of 3, 5, and 7: 1, 3, 5, 7, 9, 25, 27, 49, 81, ... - * For a non-sparse filesystem it will be every group: 1, 2, 3, 4, ... - */ -unsigned int ext2fs_list_backups(ext2_filsys fs, unsigned int *three, - unsigned int *five, unsigned int *seven) -{ - unsigned int *min = three; - int mult = 3; - unsigned int ret; - - if (!(fs->super->s_feature_ro_compat & - EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER)) { - ret = *min; - *min += 1; - return ret; - } - - if (*five < *min) { - min = five; - mult = 5; - } - if (*seven < *min) { - min = seven; - mult = 7; - } - - ret = *min; - *min *= mult; - - return ret; -} |