fs/affs/bitmap.c

41 	struct affs_sb_info *sbi = AFFS_SB(sb);
49 	if (block > sbi->s_partition_size)
52 	blk     = block - sbi->s_reserved;
53 	bmap    = blk / sbi->s_bmap_bits;
54 	bit     = blk % sbi->s_bmap_bits;
55 	bm      = &sbi->s_bitmap[bmap];
57 	mutex_lock(&sbi->s_bmlock);
59 	bh = sbi->s_bmap_bh;
60 	if (sbi->s_last_bmap != bmap) {
65 		sbi->s_bmap_bh = bh;
66 		sbi->s_last_bmap = bmap;
86 	mutex_unlock(&sbi->s_bmlock);
91 	mutex_unlock(&sbi->s_bmlock);
96 	sbi->s_bmap_bh = NULL;
97 	sbi->s_last_bmap = ~0;
98 	mutex_unlock(&sbi->s_bmlock);
118 	struct affs_sb_info *sbi;
126 	sbi = AFFS_SB(sb);
136 	if (!goal || goal > sbi->s_partition_size) {
141 		goal = sbi->s_reserved;
144 	blk = goal - sbi->s_reserved;
145 	bmap = blk / sbi->s_bmap_bits;
146 	bm = &sbi->s_bitmap[bmap];
148 	mutex_lock(&sbi->s_bmlock);
155 	i = sbi->s_bmap_count;
161 		if (bmap < sbi->s_bmap_count)
165 		bm = sbi->s_bitmap;
167 	blk = bmap * sbi->s_bmap_bits;
171 	bh = sbi->s_bmap_bh;
172 	if (sbi->s_last_bmap != bmap) {
177 		sbi->s_bmap_bh = bh;
178 		sbi->s_last_bmap = bmap;
182 	bit = blk % sbi->s_bmap_bits;
207 	blk += bit + sbi->s_reserved;
229 	mutex_unlock(&sbi->s_bmlock);
236 	sbi->s_bmap_bh = NULL;
237 	sbi->s_last_bmap = ~0;
239 	mutex_unlock(&sbi->s_bmlock);
251 	struct affs_sb_info *sbi = AFFS_SB(sb);
256 	if (!AFFS_ROOT_TAIL(sb, sbi->s_root_bh)->bm_flag) {
262 	sbi->s_last_bmap = ~0;
263 	sbi->s_bmap_bh = NULL;
264 	sbi->s_bmap_bits = sb->s_blocksize * 8 - 32;
265 	sbi->s_bmap_count = (sbi->s_partition_size - sbi->s_reserved +
266 				 sbi->s_bmap_bits - 1) / sbi->s_bmap_bits;
267 	size = sbi->s_bmap_count * sizeof(*bm);
268 	bm = sbi->s_bitmap = kzalloc(size, GFP_KERNEL);
269 	if (!sbi->s_bitmap) {
274 	bmap_blk = (__be32 *)sbi->s_root_bh->b_data;
278 	for (i = sbi->s_bmap_count; i > 0; bm++, i--) {
315 	offset = (sbi->s_partition_size - sbi->s_reserved) % sbi->s_bmap_bits;
355 	struct affs_sb_info *sbi = AFFS_SB(sb);
357 	if (!sbi->s_bitmap)
360 	affs_brelse(sbi->s_bmap_bh);
361 	sbi->s_bmap_bh = NULL;
362 	sbi->s_last_bmap = ~0;
363 	kfree(sbi->s_bitmap);
364 	sbi->s_bitmap = NULL;