19 static int udf_verify_fi(struct udf_fileident_iter *iter)  in udf_verify_fi()  argument
23 	if (iter->fi.descTag.tagIdent != cpu_to_le16(TAG_IDENT_FID)) {  in udf_verify_fi()
24 		udf_err(iter->dir->i_sb,  in udf_verify_fi()
26 			iter->dir->i_ino, (unsigned long long)iter->pos,  in udf_verify_fi()
27 			le16_to_cpu(iter->fi.descTag.tagIdent));  in udf_verify_fi()
30 	len = udf_dir_entry_len(&iter->fi);  in udf_verify_fi()
31 	if (le16_to_cpu(iter->fi.lengthOfImpUse) & 3) {  in udf_verify_fi()
32 		udf_err(iter->dir->i_sb,  in udf_verify_fi()
34 			iter->dir->i_ino, (unsigned long long)iter->pos);  in udf_verify_fi()
42 	if (len > 1 << iter->dir->i_blkbits) {  in udf_verify_fi()
43 		udf_err(iter->dir->i_sb,  in udf_verify_fi()
45 			iter->dir->i_ino, len, (unsigned long long)iter->pos);  in udf_verify_fi()
48 	if (iter->pos + len > iter->dir->i_size) {  in udf_verify_fi()
49 		udf_err(iter->dir->i_sb,  in udf_verify_fi()
51 			iter->dir->i_ino, (unsigned long long)iter->pos);  in udf_verify_fi()
54 	if (udf_dir_entry_len(&iter->fi) !=  in udf_verify_fi()
55 	    sizeof(struct tag) + le16_to_cpu(iter->fi.descTag.descCRCLength)) {  in udf_verify_fi()
56 		udf_err(iter->dir->i_sb,  in udf_verify_fi()
58 			iter->dir->i_ino,  in udf_verify_fi()
59 			(unsigned)le16_to_cpu(iter->fi.descTag.descCRCLength),  in udf_verify_fi()
60 			(unsigned)(udf_dir_entry_len(&iter->fi) -  in udf_verify_fi()
67 static int udf_copy_fi(struct udf_fileident_iter *iter)  in udf_copy_fi()  argument
69 	struct udf_inode_info *iinfo = UDF_I(iter->dir);  in udf_copy_fi()
70 	u32 blksize = 1 << iter->dir->i_blkbits;  in udf_copy_fi()
75 	if (iter->pos >= iter->dir->i_size) {  in udf_copy_fi()
76 		iter->name = NULL;  in udf_copy_fi()
79 	if (iter->dir->i_size < iter->pos + sizeof(struct fileIdentDesc)) {  in udf_copy_fi()
80 		udf_err(iter->dir->i_sb,  in udf_copy_fi()
82 			iter->dir->i_ino);  in udf_copy_fi()
86 		memcpy(&iter->fi, iinfo->i_data + iinfo->i_lenEAttr + iter->pos,  in udf_copy_fi()
88 		err = udf_verify_fi(iter);  in udf_copy_fi()
91 		iter->name = iinfo->i_data + iinfo->i_lenEAttr + iter->pos +  in udf_copy_fi()
93 			le16_to_cpu(iter->fi.lengthOfImpUse);  in udf_copy_fi()
97 	off = iter->pos & (blksize - 1);  in udf_copy_fi()
99 	memcpy(&iter->fi, iter->bh[0]->b_data + off, len);  in udf_copy_fi()
101 		memcpy((char *)(&iter->fi) + len, iter->bh[1]->b_data,  in udf_copy_fi()
103 	err = udf_verify_fi(iter);  in udf_copy_fi()
109 				le16_to_cpu(iter->fi.lengthOfImpUse);  in udf_copy_fi()
110 	if (off + udf_dir_entry_len(&iter->fi) <= blksize) {  in udf_copy_fi()
111 		iter->name = iter->bh[0]->b_data + nameoff;  in udf_copy_fi()
113 		iter->name = iter->bh[1]->b_data + (nameoff - blksize);  in udf_copy_fi()
115 		iter->name = iter->namebuf;  in udf_copy_fi()
117 		memcpy(iter->name, iter->bh[0]->b_data + nameoff, len);  in udf_copy_fi()
118 		memcpy(iter->name + len, iter->bh[1]->b_data,  in udf_copy_fi()
119 		       iter->fi.lengthFileIdent - len);  in udf_copy_fi()
125 static void udf_readahead_dir(struct udf_fileident_iter *iter)  in udf_readahead_dir()  argument
127 	unsigned int ralen = 16 >> (iter->dir->i_blkbits - 9);  in udf_readahead_dir()
132 	if (iter->loffset & (ralen - 1))  in udf_readahead_dir()
135 	if (iter->loffset + ralen > (iter->elen >> iter->dir->i_blkbits))  in udf_readahead_dir()
136 		ralen = (iter->elen >> iter->dir->i_blkbits) - iter->loffset;  in udf_readahead_dir()
139 		blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc,  in udf_readahead_dir()
140 					iter->loffset + i);  in udf_readahead_dir()
141 		tmp = sb_getblk(iter->dir->i_sb, blk);  in udf_readahead_dir()
154 static struct buffer_head *udf_fiiter_bread_blk(struct udf_fileident_iter *iter)  in udf_fiiter_bread_blk()  argument
158 	udf_readahead_dir(iter);  in udf_fiiter_bread_blk()
159 	blk = udf_get_lb_pblock(iter->dir->i_sb, &iter->eloc, iter->loffset);  in udf_fiiter_bread_blk()
160 	return sb_bread(iter->dir->i_sb, blk);  in udf_fiiter_bread_blk()
167 static int udf_fiiter_advance_blk(struct udf_fileident_iter *iter)  in udf_fiiter_advance_blk()  argument
172 	iter->loffset++;  in udf_fiiter_advance_blk()
173 	if (iter->loffset < DIV_ROUND_UP(iter->elen, 1<<iter->dir->i_blkbits))  in udf_fiiter_advance_blk()
176 	iter->loffset = 0;  in udf_fiiter_advance_blk()
177 	err = udf_next_aext(iter->dir, &iter->epos, &iter->eloc,  in udf_fiiter_advance_blk()
178 			    &iter->elen, &etype, 1);  in udf_fiiter_advance_blk()
182 		if (iter->pos == iter->dir->i_size) {  in udf_fiiter_advance_blk()
183 			iter->elen = 0;  in udf_fiiter_advance_blk()
186 		udf_err(iter->dir->i_sb,  in udf_fiiter_advance_blk()
188 			(unsigned long long)iter->pos, iter->dir->i_ino);  in udf_fiiter_advance_blk()
194 static int udf_fiiter_load_bhs(struct udf_fileident_iter *iter)  in udf_fiiter_load_bhs()  argument
196 	int blksize = 1 << iter->dir->i_blkbits;  in udf_fiiter_load_bhs()
197 	int off = iter->pos & (blksize - 1);  in udf_fiiter_load_bhs()
202 	if (!iter->bh[0] && iter->elen) {  in udf_fiiter_load_bhs()
203 		iter->bh[0] = udf_fiiter_bread_blk(iter);  in udf_fiiter_load_bhs()
204 		if (!iter->bh[0]) {  in udf_fiiter_load_bhs()
208 		if (!buffer_uptodate(iter->bh[0])) {  in udf_fiiter_load_bhs()
214 	if (iter->pos >= iter->dir->i_size)  in udf_fiiter_load_bhs()
219 	fi = (struct fileIdentDesc *)(iter->bh[0]->b_data + off);  in udf_fiiter_load_bhs()
223 		err = udf_fiiter_advance_blk(iter);  in udf_fiiter_load_bhs()
226 		iter->bh[1] = udf_fiiter_bread_blk(iter);  in udf_fiiter_load_bhs()
227 		if (!iter->bh[1]) {  in udf_fiiter_load_bhs()
231 		if (!buffer_uptodate(iter->bh[1])) {  in udf_fiiter_load_bhs()
238 	brelse(iter->bh[0]);  in udf_fiiter_load_bhs()
239 	brelse(iter->bh[1]);  in udf_fiiter_load_bhs()
240 	iter->bh[0] = iter->bh[1] = NULL;  in udf_fiiter_load_bhs()
244 int udf_fiiter_init(struct udf_fileident_iter *iter, struct inode *dir,  in udf_fiiter_init()  argument
251 	iter->dir = dir;  in udf_fiiter_init()
252 	iter->bh[0] = iter->bh[1] = NULL;  in udf_fiiter_init()
253 	iter->pos = pos;  in udf_fiiter_init()
254 	iter->elen = 0;  in udf_fiiter_init()
255 	iter->epos.bh = NULL;  in udf_fiiter_init()
256 	iter->name = NULL;  in udf_fiiter_init()
262 	iter->namebuf = kmalloc(UDF_NAME_LEN_CS0, GFP_KERNEL | __GFP_NOFAIL);  in udf_fiiter_init()
265 		err = udf_copy_fi(iter);  in udf_fiiter_init()
269 	err = inode_bmap(dir, iter->pos >> dir->i_blkbits, &iter->epos,  in udf_fiiter_init()
270 			 &iter->eloc, &iter->elen, &iter->loffset, &etype);  in udf_fiiter_init()
280 	err = udf_fiiter_load_bhs(iter);  in udf_fiiter_init()
283 	err = udf_copy_fi(iter);  in udf_fiiter_init()
286 		udf_fiiter_release(iter);  in udf_fiiter_init()
290 int udf_fiiter_advance(struct udf_fileident_iter *iter)  in udf_fiiter_advance()  argument
293 	int blksize = 1 << iter->dir->i_blkbits;  in udf_fiiter_advance()
296 	oldoff = iter->pos & (blksize - 1);  in udf_fiiter_advance()
297 	len = udf_dir_entry_len(&iter->fi);  in udf_fiiter_advance()
298 	iter->pos += len;  in udf_fiiter_advance()
299 	if (UDF_I(iter->dir)->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {  in udf_fiiter_advance()
301 			brelse(iter->bh[0]);  in udf_fiiter_advance()
302 			iter->bh[0] = NULL;  in udf_fiiter_advance()
304 			if (iter->bh[1]) {  in udf_fiiter_advance()
305 				iter->bh[0] = iter->bh[1];  in udf_fiiter_advance()
306 				iter->bh[1] = NULL;  in udf_fiiter_advance()
308 				err = udf_fiiter_advance_blk(iter);  in udf_fiiter_advance()
313 		err = udf_fiiter_load_bhs(iter);  in udf_fiiter_advance()
317 	return udf_copy_fi(iter);  in udf_fiiter_advance()
320 void udf_fiiter_release(struct udf_fileident_iter *iter)  in udf_fiiter_release()  argument
322 	iter->dir = NULL;  in udf_fiiter_release()
323 	brelse(iter->bh[0]);  in udf_fiiter_release()
324 	brelse(iter->bh[1]);  in udf_fiiter_release()
325 	iter->bh[0] = iter->bh[1] = NULL;  in udf_fiiter_release()
326 	kfree(iter->namebuf);  in udf_fiiter_release()
327 	iter->namebuf = NULL;  in udf_fiiter_release()
407 void udf_fiiter_write_fi(struct udf_fileident_iter *iter, uint8_t *impuse)  in udf_fiiter_write_fi()  argument
409 	struct udf_inode_info *iinfo = UDF_I(iter->dir);  in udf_fiiter_write_fi()
412 	int blksize = 1 << iter->dir->i_blkbits;  in udf_fiiter_write_fi()
414 	off = iter->pos & (blksize - 1);  in udf_fiiter_write_fi()
417 		len1 = iter->dir->i_size;  in udf_fiiter_write_fi()
419 		buf1 = iter->bh[0]->b_data;  in udf_fiiter_write_fi()
421 		if (iter->bh[1]) {  in udf_fiiter_write_fi()
422 			buf2 = iter->bh[1]->b_data;  in udf_fiiter_write_fi()
427 	udf_copy_fi_to_bufs(buf1, len1, buf2, len2, off, &iter->fi, impuse,  in udf_fiiter_write_fi()
428 			    iter->name == iter->namebuf ? iter->name : NULL);  in udf_fiiter_write_fi()
431 		mark_inode_dirty(iter->dir);  in udf_fiiter_write_fi()
433 		mark_buffer_dirty_inode(iter->bh[0], iter->dir);  in udf_fiiter_write_fi()
434 		if (iter->bh[1])  in udf_fiiter_write_fi()
435 			mark_buffer_dirty_inode(iter->bh[1], iter->dir);  in udf_fiiter_write_fi()
437 	inode_inc_iversion(iter->dir);  in udf_fiiter_write_fi()
440 void udf_fiiter_update_elen(struct udf_fileident_iter *iter, uint32_t new_elen)  in udf_fiiter_update_elen()  argument
442 	struct udf_inode_info *iinfo = UDF_I(iter->dir);  in udf_fiiter_update_elen()
443 	int diff = new_elen - iter->elen;  in udf_fiiter_update_elen()
446 	if (!iter->elen)  in udf_fiiter_update_elen()
448 	iter->elen = new_elen;  in udf_fiiter_update_elen()
450 		iter->epos.offset -= sizeof(struct short_ad);  in udf_fiiter_update_elen()
452 		iter->epos.offset -= sizeof(struct long_ad);  in udf_fiiter_update_elen()
453 	udf_write_aext(iter->dir, &iter->epos, &iter->eloc, iter->elen, 1);  in udf_fiiter_update_elen()
455 	mark_inode_dirty(iter->dir);  in udf_fiiter_update_elen()
459 int udf_fiiter_append_blk(struct udf_fileident_iter *iter)  in udf_fiiter_append_blk()  argument
461 	struct udf_inode_info *iinfo = UDF_I(iter->dir);  in udf_fiiter_append_blk()
462 	int blksize = 1 << iter->dir->i_blkbits;  in udf_fiiter_append_blk()
465 	uint32_t old_elen = iter->elen;  in udf_fiiter_append_blk()
473 	udf_fiiter_update_elen(iter, ALIGN(iter->elen, blksize));  in udf_fiiter_append_blk()
476 	block = iinfo->i_lenExtents >> iter->dir->i_blkbits;  in udf_fiiter_append_blk()
477 	bh = udf_bread(iter->dir, block, 1, &err);  in udf_fiiter_append_blk()
479 		udf_fiiter_update_elen(iter, old_elen);  in udf_fiiter_append_blk()
482 	err = inode_bmap(iter->dir, block, &iter->epos, &iter->eloc, &iter->elen,  in udf_fiiter_append_blk()
483 		   &iter->loffset, &etype);  in udf_fiiter_append_blk()
485 		udf_err(iter->dir->i_sb,  in udf_fiiter_append_blk()
487 			(unsigned long long)block, iter->dir->i_ino);  in udf_fiiter_append_blk()
490 	if (!(iter->pos & (blksize - 1))) {  in udf_fiiter_append_blk()
491 		brelse(iter->bh[0]);  in udf_fiiter_append_blk()
492 		iter->bh[0] = bh;  in udf_fiiter_append_blk()
494 		iter->bh[1] = bh;  in udf_fiiter_append_blk()