1 /* vi: set sw=4 ts=4: */
3 * bmove.c --- Move blocks around to make way for a particular
4 * filesystem structure.
6 * Copyright (C) 1997 Theodore Ts'o. This file may be redistributed
7 * under the terms of the GNU Public License.
16 #include <sys/types.h>
22 struct process_block_struct {
24 struct ext2_inode * inode;
25 ext2fs_block_bitmap reserve;
26 ext2fs_block_bitmap alloc_map;
33 static int process_block(ext2_filsys fs, blk_t *block_nr,
34 e2_blkcnt_t blockcnt, blk_t ref_block,
35 int ref_offset, void *priv_data)
37 struct process_block_struct *pb;
42 pb = (struct process_block_struct *) priv_data;
43 block = orig = *block_nr;
47 * Let's see if this is one which we need to relocate
49 if (ext2fs_test_block_bitmap(pb->reserve, block)) {
51 if (++block >= fs->super->s_blocks_count)
52 block = fs->super->s_first_data_block;
54 pb->error = EXT2_ET_BLOCK_ALLOC_FAIL;
57 } while (ext2fs_test_block_bitmap(pb->reserve, block) ||
58 ext2fs_test_block_bitmap(pb->alloc_map, block));
60 retval = io_channel_read_blk(fs->io, orig, 1, pb->buf);
65 retval = io_channel_write_blk(fs->io, block, 1, pb->buf);
71 ext2fs_mark_block_bitmap(pb->alloc_map, block);
73 if (pb->flags & EXT2_BMOVE_DEBUG)
74 printf("ino=%ld, blockcnt=%lld, %d->%d\n", pb->ino,
75 blockcnt, orig, block);
78 retval = ext2fs_add_dir_block(fs->dblist, pb->ino,
79 block, (int) blockcnt);
88 errcode_t ext2fs_move_blocks(ext2_filsys fs,
89 ext2fs_block_bitmap reserve,
90 ext2fs_block_bitmap alloc_map,
94 struct ext2_inode inode;
96 struct process_block_struct pb;
100 retval = ext2fs_open_inode_scan(fs, 0, &scan);
104 pb.reserve = reserve;
106 pb.alloc_map = alloc_map ? alloc_map : fs->block_map;
109 retval = ext2fs_get_mem(fs->blocksize * 4, &block_buf);
112 pb.buf = block_buf + fs->blocksize * 3;
115 * If GET_DBLIST is set in the flags field, then we should
116 * gather directory block information while we're doing the
119 if (flags & EXT2_BMOVE_GET_DBLIST) {
120 ext2fs_free_dblist(fs->dblist);
122 retval = ext2fs_init_dblist(fs, 0);
127 retval = ext2fs_get_next_inode(scan, &ino, &inode);
132 if ((inode.i_links_count == 0) ||
133 !ext2fs_inode_has_valid_blocks(&inode))
139 pb.add_dir = (LINUX_S_ISDIR(inode.i_mode) &&
140 flags & EXT2_BMOVE_GET_DBLIST);
142 retval = ext2fs_block_iterate2(fs, ino, 0, block_buf,
150 retval = ext2fs_get_next_inode(scan, &ino, &inode);
151 if (retval == EXT2_ET_BAD_BLOCK_IN_INODE_TABLE)