1 /* vi: set sw=4 ts=4: */
3 * bb_inode.c --- routines to update the bad block inode.
5 * WARNING: This routine modifies a lot of state in the filesystem; if
6 * this routine returns an error, the bad block inode may be in an
9 * Copyright (C) 1994, 1995 Theodore Ts'o.
12 * This file may be redistributed under the terms of the GNU Public
28 #include <sys/types.h>
34 struct set_badblock_record {
35 ext2_badblocks_iterate bb_iter;
45 static int set_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
47 blk_t ref_block, int ref_offset,
49 static int clear_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
51 blk_t ref_block, int ref_offset,
55 * Given a bad blocks bitmap, update the bad blocks inode to reflect
58 errcode_t ext2fs_update_bb_inode(ext2_filsys fs, ext2_badblocks_list bb_list)
61 struct set_badblock_record rec;
62 struct ext2_inode inode;
64 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
67 return EXT2_ET_NO_BLOCK_BITMAP;
69 rec.bad_block_count = 0;
70 rec.ind_blocks_size = rec.ind_blocks_ptr = 0;
71 rec.max_ind_blocks = 10;
72 retval = ext2fs_get_mem(rec.max_ind_blocks * sizeof(blk_t),
76 memset(rec.ind_blocks, 0, rec.max_ind_blocks * sizeof(blk_t));
77 retval = ext2fs_get_mem(fs->blocksize, &rec.block_buf);
80 memset(rec.block_buf, 0, fs->blocksize);
84 * First clear the old bad blocks (while saving the indirect blocks)
86 retval = ext2fs_block_iterate2(fs, EXT2_BAD_INO,
87 BLOCK_FLAG_DEPTH_TRAVERSE, 0,
88 clear_bad_block_proc, &rec);
97 * Now set the bad blocks!
99 * First, mark the bad blocks as used. This prevents a bad
100 * block from being used as an indirecto block for the bad
104 retval = ext2fs_badblocks_list_iterate_begin(bb_list,
108 retval = ext2fs_block_iterate2(fs, EXT2_BAD_INO,
109 BLOCK_FLAG_APPEND, 0,
110 set_bad_block_proc, &rec);
111 ext2fs_badblocks_list_iterate_end(rec.bb_iter);
121 * Update the bad block inode's mod time and block count
124 retval = ext2fs_read_inode(fs, EXT2_BAD_INO, &inode);
128 inode.i_atime = inode.i_mtime = time(0);
130 inode.i_ctime = time(0);
131 inode.i_blocks = rec.bad_block_count * (fs->blocksize / 512);
132 inode.i_size = rec.bad_block_count * fs->blocksize;
134 retval = ext2fs_write_inode(fs, EXT2_BAD_INO, &inode);
139 ext2fs_free_mem(&rec.ind_blocks);
140 ext2fs_free_mem(&rec.block_buf);
145 * Helper function for update_bb_inode()
147 * Clear the bad blocks in the bad block inode, while saving the
153 static int clear_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
154 e2_blkcnt_t blockcnt,
155 blk_t ref_block EXT2FS_ATTR((unused)),
156 int ref_offset EXT2FS_ATTR((unused)),
159 struct set_badblock_record *rec = (struct set_badblock_record *)
162 unsigned long old_size;
168 * If the block number is outrageous, clear it and ignore it.
170 if (*block_nr >= fs->super->s_blocks_count ||
171 *block_nr < fs->super->s_first_data_block) {
173 return BLOCK_CHANGED;
177 if (rec->ind_blocks_size >= rec->max_ind_blocks) {
178 old_size = rec->max_ind_blocks * sizeof(blk_t);
179 rec->max_ind_blocks += 10;
180 retval = ext2fs_resize_mem(old_size,
181 rec->max_ind_blocks * sizeof(blk_t),
184 rec->max_ind_blocks -= 10;
189 rec->ind_blocks[rec->ind_blocks_size++] = *block_nr;
193 * Mark the block as unused, and update accounting information
195 ext2fs_block_alloc_stats(fs, *block_nr, -1);
198 return BLOCK_CHANGED;
203 * Helper function for update_bb_inode()
205 * Set the block list in the bad block inode, using the supplied bitmap.
210 static int set_bad_block_proc(ext2_filsys fs, blk_t *block_nr,
211 e2_blkcnt_t blockcnt,
212 blk_t ref_block EXT2FS_ATTR((unused)),
213 int ref_offset EXT2FS_ATTR((unused)),
216 struct set_badblock_record *rec = (struct set_badblock_record *)
223 * Get the next bad block.
225 if (!ext2fs_badblocks_list_iterate(rec->bb_iter, &blk))
227 rec->bad_block_count++;
230 * An indirect block; fetch a block from the
231 * previously used indirect block list. The block
232 * most be not marked as used; if so, get another one.
233 * If we run out of reserved indirect blocks, allocate
237 if (rec->ind_blocks_ptr < rec->ind_blocks_size) {
238 blk = rec->ind_blocks[rec->ind_blocks_ptr++];
239 if (ext2fs_test_block_bitmap(fs->block_map, blk))
242 retval = ext2fs_new_block(fs, 0, 0, &blk);
248 retval = io_channel_write_blk(fs->io, blk, 1, rec->block_buf);
256 * Update block counts
258 ext2fs_block_alloc_stats(fs, blk, +1);
261 return BLOCK_CHANGED;