fs/adfs/dir_fplus.c

70 static u8 adfs_fplus_checkbyte(struct adfs_dir *dir)
72 	struct adfs_bigdirheader *h = dir->bighead;
73 	struct adfs_bigdirtail *t = dir->bigtail;
83 		bp = (void *)dir->bhs[bi]->b_data;
84 		bs = dir->bhs[bi]->b_size;
104 			   unsigned int size, struct adfs_dir *dir)
112 	ret = adfs_dir_read_buffers(sb, indaddr, sb->s_blocksize, dir);
116 	dir->bighead = h = (void *)dir->bhs[0]->b_data;
119 		adfs_error(sb, "dir %06x has malformed header", indaddr);
126 			 "dir %06x header size %X does not match directory size %X",
131 	ret = adfs_dir_read_buffers(sb, indaddr, dirsize, dir);
135 	dir->bigtail = t = (struct adfs_bigdirtail *)
136 		(dir->bhs[dir->nr_buffers - 1]->b_data + (sb->s_blocksize - 8));
140 		adfs_error(sb, "dir %06x has malformed tail", indaddr);
144 	if (adfs_fplus_checkbyte(dir) != t->bigdircheckbyte) {
145 		adfs_error(sb, "dir %06x checkbyte mismatch\n", indaddr);
149 	dir->parent_id = le32_to_cpu(h->bigdirparent);
153 	adfs_dir_relse(dir);
159 adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos)
163 	if (fpos <= le32_to_cpu(dir->bighead->bigdirentries)) {
164 		dir->pos = fpos;
172 adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
174 	struct adfs_bigdirheader *h = dir->bighead;
179 	if (dir->pos >= le32_to_cpu(h->bigdirentries))
182 	offset = adfs_fplus_offset(h, dir->pos);
184 	ret = adfs_dir_copyfrom(&bde, dir, offset,
199 	ret = adfs_dir_copyfrom(obj->name, dir, offset, obj->name_len);
203 	adfs_object_fixup(dir, obj);
205 	dir->pos += 1;
210 static int adfs_fplus_iterate(struct adfs_dir *dir, struct dir_context *ctx)
217 	if (adfs_fplus_setpos(dir, ctx->pos - 2))
220 	while (!adfs_fplus_getnext(dir, &obj)) {
230 static int adfs_fplus_update(struct adfs_dir *dir, struct object_info *obj)
232 	struct adfs_bigdirheader *h = dir->bighead;
242 			adfs_error(dir->sb, "unable to locate entry to update");
245 		ret = adfs_dir_copyfrom(&bde, dir, offset, sizeof(bde));
247 			adfs_error(dir->sb, "error reading directory entry");
258 	return adfs_dir_copyto(dir, offset, &bde, sizeof(bde));
261 static int adfs_fplus_commit(struct adfs_dir *dir)
266 	dir->bighead->startmasseq += 1;
267 	dir->bigtail->bigdirendmasseq += 1;
270 	dir->bigtail->bigdircheckbyte = adfs_fplus_checkbyte(dir);
273 	ret = adfs_fplus_validate_header(dir->bighead);
275 		ret = adfs_fplus_validate_tail(dir->bighead, dir->bigtail);