Linux-libre 4.5-gnu

7 files changed, 170 insertions, 212 deletions

diff --git a/fs/udf/balloc.c b/fs/udf/balloc.c
index 6d6a96b4e..e0fd65fe7 100644
--- a/fs/udf/balloc.c
+++ b/fs/udf/balloc.c
@@ -447,9 +447,6 @@ static void udf_table_free_blocks(struct super_block *sb,
 		 */
 
 		int adsize;
-		struct short_ad *sad = NULL;
-		struct long_ad *lad = NULL;
-		struct allocExtDesc *aed;
 
 		eloc.logicalBlockNum = start;
 		elen = EXT_RECORDED_ALLOCATED |
@@ -466,102 +463,17 @@ static void udf_table_free_blocks(struct super_block *sb,
 		}
 
 		if (epos.offset + (2 * adsize) > sb->s_blocksize) {
-			unsigned char *sptr, *dptr;
-			int loffset;
-
-			brelse(oepos.bh);
-			oepos = epos;
-
 			/* Steal a block from the extent being free'd */
-			epos.block.logicalBlockNum = eloc.logicalBlockNum;
+			udf_setup_indirect_aext(table, eloc.logicalBlockNum,
+						&epos);
+
 			eloc.logicalBlockNum++;
 			elen -= sb->s_blocksize;
-
-			epos.bh = udf_tread(sb,
-					udf_get_lb_pblock(sb, &epos.block, 0));
-			if (!epos.bh) {
-				brelse(oepos.bh);
-				goto error_return;
-			}
-			aed = (struct allocExtDesc *)(epos.bh->b_data);
-			aed->previousAllocExtLocation =
-				cpu_to_le32(oepos.block.logicalBlockNum);
-			if (epos.offset + adsize > sb->s_blocksize) {
-				loffset = epos.offset;
-				aed->lengthAllocDescs = cpu_to_le32(adsize);
-				sptr = iinfo->i_ext.i_data + epos.offset
-								- adsize;
-				dptr = epos.bh->b_data +
-					sizeof(struct allocExtDesc);
-				memcpy(dptr, sptr, adsize);
-				epos.offset = sizeof(struct allocExtDesc) +
-						adsize;
-			} else {
-				loffset = epos.offset + adsize;
-				aed->lengthAllocDescs = cpu_to_le32(0);
-				if (oepos.bh) {
-					sptr = oepos.bh->b_data + epos.offset;
-					aed = (struct allocExtDesc *)
-						oepos.bh->b_data;
-					le32_add_cpu(&aed->lengthAllocDescs,
-							adsize);
-				} else {
-					sptr = iinfo->i_ext.i_data +
-								epos.offset;
-					iinfo->i_lenAlloc += adsize;
-					mark_inode_dirty(table);
-				}
-				epos.offset = sizeof(struct allocExtDesc);
-			}
-			if (sbi->s_udfrev >= 0x0200)
-				udf_new_tag(epos.bh->b_data, TAG_IDENT_AED,
-					    3, 1, epos.block.logicalBlockNum,
-					    sizeof(struct tag));
-			else
-				udf_new_tag(epos.bh->b_data, TAG_IDENT_AED,
-					    2, 1, epos.block.logicalBlockNum,
-					    sizeof(struct tag));
-
-			switch (iinfo->i_alloc_type) {
-			case ICBTAG_FLAG_AD_SHORT:
-				sad = (struct short_ad *)sptr;
-				sad->extLength = cpu_to_le32(
-					EXT_NEXT_EXTENT_ALLOCDECS |
-					sb->s_blocksize);
-				sad->extPosition =
-					cpu_to_le32(epos.block.logicalBlockNum);
-				break;
-			case ICBTAG_FLAG_AD_LONG:
-				lad = (struct long_ad *)sptr;
-				lad->extLength = cpu_to_le32(
-					EXT_NEXT_EXTENT_ALLOCDECS |
-					sb->s_blocksize);
-				lad->extLocation =
-					cpu_to_lelb(epos.block);
-				break;
-			}
-			if (oepos.bh) {
-				udf_update_tag(oepos.bh->b_data, loffset);
-				mark_buffer_dirty(oepos.bh);
-			} else {
-				mark_inode_dirty(table);
-			}
 		}
 
 		/* It's possible that stealing the block emptied the extent */
-		if (elen) {
-			udf_write_aext(table, &epos, &eloc, elen, 1);
-
-			if (!epos.bh) {
-				iinfo->i_lenAlloc += adsize;
-				mark_inode_dirty(table);
-			} else {
-				aed = (struct allocExtDesc *)epos.bh->b_data;
-				le32_add_cpu(&aed->lengthAllocDescs, adsize);
-				udf_update_tag(epos.bh->b_data, epos.offset);
-				mark_buffer_dirty(epos.bh);
-			}
-		}
+		if (elen)
+			__udf_add_aext(table, &epos, &eloc, elen, 1);
 	}
 
 	brelse(epos.bh);
diff --git a/fs/udf/file.c b/fs/udf/file.c
index bddf3d071..1af98963d 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -122,7 +122,7 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	struct udf_inode_info *iinfo = UDF_I(inode);
 	int err;
 
-	mutex_lock(&inode->i_mutex);
+	inode_lock(inode);
 
 	retval = generic_write_checks(iocb, from);
 	if (retval <= 0)
@@ -136,7 +136,7 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 				(udf_file_entry_alloc_offset(inode) + end)) {
 			err = udf_expand_file_adinicb(inode);
 			if (err) {
-				mutex_unlock(&inode->i_mutex);
+				inode_unlock(inode);
 				udf_debug("udf_expand_adinicb: err=%d\n", err);
 				return err;
 			}
@@ -149,7 +149,7 @@ static ssize_t udf_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 
 	retval = __generic_file_write_iter(iocb, from);
 out:
-	mutex_unlock(&inode->i_mutex);
+	inode_unlock(inode);
 
 	if (retval > 0) {
 		mark_inode_dirty(inode);
@@ -223,12 +223,12 @@ static int udf_release_file(struct inode *inode, struct file *filp)
 		 * Grab i_mutex to avoid races with writes changing i_size
 		 * while we are running.
 		 */
-		mutex_lock(&inode->i_mutex);
+		inode_lock(inode);
 		down_write(&UDF_I(inode)->i_data_sem);
 		udf_discard_prealloc(inode);
 		udf_truncate_tail_extent(inode);
 		up_write(&UDF_I(inode)->i_data_sem);
-		mutex_unlock(&inode->i_mutex);
+		inode_unlock(inode);
 	}
 	return 0;
 }
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 566df9b5a..166d3ed32 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -262,7 +262,7 @@ int udf_expand_file_adinicb(struct inode *inode)
 		.nr_to_write = 1,
 	};
 
-	WARN_ON_ONCE(!mutex_is_locked(&inode->i_mutex));
+	WARN_ON_ONCE(!inode_is_locked(inode));
 	if (!iinfo->i_lenAlloc) {
 		if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD))
 			iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT;
@@ -539,9 +539,18 @@ static int udf_do_extend_file(struct inode *inode,
 		udf_add_aext(inode, last_pos, &last_ext->extLocation,
 			     last_ext->extLength, 1);
 		count++;
-	} else
+	} else {
+		struct kernel_lb_addr tmploc;
+		uint32_t tmplen;
+
 		udf_write_aext(inode, last_pos, &last_ext->extLocation,
 				last_ext->extLength, 1);
+		/*
+		 * We've rewritten the last extent but there may be empty
+		 * indirect extent after it - enter it.
+		 */
+		udf_next_aext(inode, last_pos, &tmploc, &tmplen, 0);
+	}
 
 	/* Managed to do everything necessary? */
 	if (!blocks)
@@ -1540,7 +1549,8 @@ reread:
 		break;
 	case ICBTAG_FILE_TYPE_SYMLINK:
 		inode->i_data.a_ops = &udf_symlink_aops;
-		inode->i_op = &udf_symlink_inode_operations;
+		inode->i_op = &page_symlink_inode_operations;
+		inode_nohighmem(inode);
 		inode->i_mode = S_IFLNK | S_IRWXUGO;
 		break;
 	case ICBTAG_FILE_TYPE_MAIN:
@@ -1866,22 +1876,90 @@ struct inode *__udf_iget(struct super_block *sb, struct kernel_lb_addr *ino,
 	return inode;
 }
 
-int udf_add_aext(struct inode *inode, struct extent_position *epos,
-		 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+int udf_setup_indirect_aext(struct inode *inode, int block,
+			    struct extent_position *epos)
 {
-	int adsize;
-	struct short_ad *sad = NULL;
-	struct long_ad *lad = NULL;
+	struct super_block *sb = inode->i_sb;
+	struct buffer_head *bh;
 	struct allocExtDesc *aed;
-	uint8_t *ptr;
-	struct udf_inode_info *iinfo = UDF_I(inode);
+	struct extent_position nepos;
+	struct kernel_lb_addr neloc;
+	int ver, adsize;
 
-	if (!epos->bh)
-		ptr = iinfo->i_ext.i_data + epos->offset -
-			udf_file_entry_alloc_offset(inode) +
-			iinfo->i_lenEAttr;
+	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+		adsize = sizeof(struct short_ad);
+	else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+		adsize = sizeof(struct long_ad);
 	else
-		ptr = epos->bh->b_data + epos->offset;
+		return -EIO;
+
+	neloc.logicalBlockNum = block;
+	neloc.partitionReferenceNum = epos->block.partitionReferenceNum;
+
+	bh = udf_tgetblk(sb, udf_get_lb_pblock(sb, &neloc, 0));
+	if (!bh)
+		return -EIO;
+	lock_buffer(bh);
+	memset(bh->b_data, 0x00, sb->s_blocksize);
+	set_buffer_uptodate(bh);
+	unlock_buffer(bh);
+	mark_buffer_dirty_inode(bh, inode);
+
+	aed = (struct allocExtDesc *)(bh->b_data);
+	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_STRICT)) {
+		aed->previousAllocExtLocation =
+				cpu_to_le32(epos->block.logicalBlockNum);
+	}
+	aed->lengthAllocDescs = cpu_to_le32(0);
+	if (UDF_SB(sb)->s_udfrev >= 0x0200)
+		ver = 3;
+	else
+		ver = 2;
+	udf_new_tag(bh->b_data, TAG_IDENT_AED, ver, 1, block,
+		    sizeof(struct tag));
+
+	nepos.block = neloc;
+	nepos.offset = sizeof(struct allocExtDesc);
+	nepos.bh = bh;
+
+	/*
+	 * Do we have to copy current last extent to make space for indirect
+	 * one?
+	 */
+	if (epos->offset + adsize > sb->s_blocksize) {
+		struct kernel_lb_addr cp_loc;
+		uint32_t cp_len;
+		int cp_type;
+
+		epos->offset -= adsize;
+		cp_type = udf_current_aext(inode, epos, &cp_loc, &cp_len, 0);
+		cp_len |= ((uint32_t)cp_type) << 30;
+
+		__udf_add_aext(inode, &nepos, &cp_loc, cp_len, 1);
+		udf_write_aext(inode, epos, &nepos.block,
+			       sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
+	} else {
+		__udf_add_aext(inode, epos, &nepos.block,
+			       sb->s_blocksize | EXT_NEXT_EXTENT_ALLOCDECS, 0);
+	}
+
+	brelse(epos->bh);
+	*epos = nepos;
+
+	return 0;
+}
+
+/*
+ * Append extent at the given position - should be the first free one in inode
+ * / indirect extent. This function assumes there is enough space in the inode
+ * or indirect extent. Use udf_add_aext() if you didn't check for this before.
+ */
+int __udf_add_aext(struct inode *inode, struct extent_position *epos,
+		   struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+{
+	struct udf_inode_info *iinfo = UDF_I(inode);
+	struct allocExtDesc *aed;
+	int adsize;
 
 	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 		adsize = sizeof(struct short_ad);
@@ -1890,88 +1968,14 @@ int udf_add_aext(struct inode *inode, struct extent_position *epos,
 	else
 		return -EIO;
 
-	if (epos->offset + (2 * adsize) > inode->i_sb->s_blocksize) {
-		unsigned char *sptr, *dptr;
-		struct buffer_head *nbh;
-		int err, loffset;
-		struct kernel_lb_addr obloc = epos->block;
-
-		epos->block.logicalBlockNum = udf_new_block(inode->i_sb, NULL,
-						obloc.partitionReferenceNum,
-						obloc.logicalBlockNum, &err);
-		if (!epos->block.logicalBlockNum)
-			return -ENOSPC;
-		nbh = udf_tgetblk(inode->i_sb, udf_get_lb_pblock(inode->i_sb,
-								 &epos->block,
-								 0));
-		if (!nbh)
-			return -EIO;
-		lock_buffer(nbh);
-		memset(nbh->b_data, 0x00, inode->i_sb->s_blocksize);
-		set_buffer_uptodate(nbh);
-		unlock_buffer(nbh);
-		mark_buffer_dirty_inode(nbh, inode);
-
-		aed = (struct allocExtDesc *)(nbh->b_data);
-		if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT))
-			aed->previousAllocExtLocation =
-					cpu_to_le32(obloc.logicalBlockNum);
-		if (epos->offset + adsize > inode->i_sb->s_blocksize) {
-			loffset = epos->offset;
-			aed->lengthAllocDescs = cpu_to_le32(adsize);
-			sptr = ptr - adsize;
-			dptr = nbh->b_data + sizeof(struct allocExtDesc);
-			memcpy(dptr, sptr, adsize);
-			epos->offset = sizeof(struct allocExtDesc) + adsize;
-		} else {
-			loffset = epos->offset + adsize;
-			aed->lengthAllocDescs = cpu_to_le32(0);
-			sptr = ptr;
-			epos->offset = sizeof(struct allocExtDesc);
-
-			if (epos->bh) {
-				aed = (struct allocExtDesc *)epos->bh->b_data;
-				le32_add_cpu(&aed->lengthAllocDescs, adsize);
-			} else {
-				iinfo->i_lenAlloc += adsize;
-				mark_inode_dirty(inode);
-			}
-		}
-		if (UDF_SB(inode->i_sb)->s_udfrev >= 0x0200)
-			udf_new_tag(nbh->b_data, TAG_IDENT_AED, 3, 1,
-				    epos->block.logicalBlockNum, sizeof(struct tag));
-		else
-			udf_new_tag(nbh->b_data, TAG_IDENT_AED, 2, 1,
-				    epos->block.logicalBlockNum, sizeof(struct tag));
-		switch (iinfo->i_alloc_type) {
-		case ICBTAG_FLAG_AD_SHORT:
-			sad = (struct short_ad *)sptr;
-			sad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
-						     inode->i_sb->s_blocksize);
-			sad->extPosition =
-				cpu_to_le32(epos->block.logicalBlockNum);
-			break;
-		case ICBTAG_FLAG_AD_LONG:
-			lad = (struct long_ad *)sptr;
-			lad->extLength = cpu_to_le32(EXT_NEXT_EXTENT_ALLOCDECS |
-						     inode->i_sb->s_blocksize);
-			lad->extLocation = cpu_to_lelb(epos->block);
-			memset(lad->impUse, 0x00, sizeof(lad->impUse));
-			break;
-		}
-		if (epos->bh) {
-			if (!UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_STRICT) ||
-			    UDF_SB(inode->i_sb)->s_udfrev >= 0x0201)
-				udf_update_tag(epos->bh->b_data, loffset);
-			else
-				udf_update_tag(epos->bh->b_data,
-						sizeof(struct allocExtDesc));
-			mark_buffer_dirty_inode(epos->bh, inode);
-			brelse(epos->bh);
-		} else {
-			mark_inode_dirty(inode);
-		}
-		epos->bh = nbh;
+	if (!epos->bh) {
+		WARN_ON(iinfo->i_lenAlloc !=
+			epos->offset - udf_file_entry_alloc_offset(inode));
+	} else {
+		aed = (struct allocExtDesc *)epos->bh->b_data;
+		WARN_ON(le32_to_cpu(aed->lengthAllocDescs) !=
+			epos->offset - sizeof(struct allocExtDesc));
+		WARN_ON(epos->offset + adsize > inode->i_sb->s_blocksize);
 	}
 
 	udf_write_aext(inode, epos, eloc, elen, inc);
@@ -1995,6 +1999,41 @@ int udf_add_aext(struct inode *inode, struct extent_position *epos,
 	return 0;
 }
 
+/*
+ * Append extent at given position - should be the first free one in inode
+ * / indirect extent. Takes care of allocating and linking indirect blocks.
+ */
+int udf_add_aext(struct inode *inode, struct extent_position *epos,
+		 struct kernel_lb_addr *eloc, uint32_t elen, int inc)
+{
+	int adsize;
+	struct super_block *sb = inode->i_sb;
+
+	if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
+		adsize = sizeof(struct short_ad);
+	else if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_LONG)
+		adsize = sizeof(struct long_ad);
+	else
+		return -EIO;
+
+	if (epos->offset + (2 * adsize) > sb->s_blocksize) {
+		int err;
+		int new_block;
+
+		new_block = udf_new_block(sb, NULL,
+					  epos->block.partitionReferenceNum,
+					  epos->block.logicalBlockNum, &err);
+		if (!new_block)
+			return -ENOSPC;
+
+		err = udf_setup_indirect_aext(inode, new_block, epos);
+		if (err)
+			return err;
+	}
+
+	return __udf_add_aext(inode, epos, eloc, elen, inc);
+}
+
 void udf_write_aext(struct inode *inode, struct extent_position *epos,
 		    struct kernel_lb_addr *eloc, uint32_t elen, int inc)
 {
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index c97b5a8d1..42eafb91f 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -921,7 +921,8 @@ static int udf_symlink(struct inode *dir, struct dentry *dentry,
 	}
 
 	inode->i_data.a_ops = &udf_symlink_aops;
-	inode->i_op = &udf_symlink_inode_operations;
+	inode->i_op = &page_symlink_inode_operations;
+	inode_nohighmem(inode);
 
 	if (iinfo->i_alloc_type != ICBTAG_FLAG_AD_IN_ICB) {
 		struct kernel_lb_addr eloc;
@@ -1344,8 +1345,3 @@ const struct inode_operations udf_dir_inode_operations = {
 	.rename				= udf_rename,
 	.tmpfile			= udf_tmpfile,
 };
-const struct inode_operations udf_symlink_inode_operations = {
-	.readlink	= generic_readlink,
-	.follow_link	= page_follow_link_light,
-	.put_link	= page_put_link,
-};
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 81155b9b4..a522c15a0 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -179,7 +179,8 @@ static int __init init_inodecache(void)
 	udf_inode_cachep = kmem_cache_create("udf_inode_cache",
 					     sizeof(struct udf_inode_info),
 					     0, (SLAB_RECLAIM_ACCOUNT |
-						 SLAB_MEM_SPREAD),
+						 SLAB_MEM_SPREAD |
+						 SLAB_ACCOUNT),
 					     init_once);
 	if (!udf_inode_cachep)
 		return -ENOMEM;
@@ -278,17 +279,12 @@ static void udf_sb_free_bitmap(struct udf_bitmap *bitmap)
 {
 	int i;
 	int nr_groups = bitmap->s_nr_groups;
-	int size = sizeof(struct udf_bitmap) + (sizeof(struct buffer_head *) *
-						nr_groups);
 
 	for (i = 0; i < nr_groups; i++)
 		if (bitmap->s_block_bitmap[i])
 			brelse(bitmap->s_block_bitmap[i]);
 
-	if (size <= PAGE_SIZE)
-		kfree(bitmap);
-	else
-		vfree(bitmap);
+	kvfree(bitmap);
 }
 
 static void udf_free_partition(struct udf_part_map *map)
@@ -1586,6 +1582,13 @@ static void udf_load_logicalvolint(struct super_block *sb, struct kernel_extent_
 }
 
 /*
+ * Maximum number of Terminating Descriptor redirections. The chosen number is
+ * arbitrary - just that we hopefully don't limit any real use of rewritten
+ * inode on write-once media but avoid looping for too long on corrupted media.
+ */
+#define UDF_MAX_TD_NESTING 64
+
+/*
  * Process a main/reserve volume descriptor sequence.
  *   @block		First block of first extent of the sequence.
  *   @lastblock		Lastblock of first extent of the sequence.
@@ -1609,6 +1612,7 @@ static noinline int udf_process_sequence(
 	uint16_t ident;
 	long next_s = 0, next_e = 0;
 	int ret;
+	unsigned int indirections = 0;
 
 	memset(vds, 0, sizeof(struct udf_vds_record) * VDS_POS_LENGTH);
 
@@ -1679,6 +1683,12 @@ static noinline int udf_process_sequence(
 			}
 			break;
 		case TAG_IDENT_TD: /* ISO 13346 3/10.9 */
+			if (++indirections > UDF_MAX_TD_NESTING) {
+				udf_err(sb, "too many TDs (max %u supported)\n", UDF_MAX_TD_NESTING);
+				brelse(bh);
+				return -EIO;
+			}
+
 			vds[VDS_POS_TERMINATING_DESC].block = block;
 			if (next_e) {
 				block = next_s;
diff --git a/fs/udf/symlink.c b/fs/udf/symlink.c
index 862535b3b..8d6197730 100644
--- a/fs/udf/symlink.c
+++ b/fs/udf/symlink.c
@@ -107,7 +107,7 @@ static int udf_symlink_filler(struct file *file, struct page *page)
 	struct buffer_head *bh = NULL;
 	unsigned char *symlink;
 	int err;
-	unsigned char *p = kmap(page);
+	unsigned char *p = page_address(page);
 	struct udf_inode_info *iinfo;
 	uint32_t pos;
 
@@ -141,7 +141,6 @@ static int udf_symlink_filler(struct file *file, struct page *page)
 
 	up_read(&iinfo->i_data_sem);
 	SetPageUptodate(page);
-	kunmap(page);
 	unlock_page(page);
 	return 0;
 
@@ -149,7 +148,6 @@ out_unlock_inode:
 	up_read(&iinfo->i_data_sem);
 	SetPageError(page);
 out_unmap:
-	kunmap(page);
 	unlock_page(page);
 	return err;
 }
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 47bb3f5ca..fa0044b6b 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -85,7 +85,6 @@ extern const struct inode_operations udf_dir_inode_operations;
 extern const struct file_operations udf_dir_operations;
 extern const struct inode_operations udf_file_inode_operations;
 extern const struct file_operations udf_file_operations;
-extern const struct inode_operations udf_symlink_inode_operations;
 extern const struct address_space_operations udf_aops;
 extern const struct address_space_operations udf_adinicb_aops;
 extern const struct address_space_operations udf_symlink_aops;
@@ -159,6 +158,10 @@ extern int udf_write_inode(struct inode *, struct writeback_control *wbc);
 extern long udf_block_map(struct inode *, sector_t);
 extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *,
 			 struct kernel_lb_addr *, uint32_t *, sector_t *);
+extern int udf_setup_indirect_aext(struct inode *inode, int block,
+				   struct extent_position *epos);
+extern int __udf_add_aext(struct inode *inode, struct extent_position *epos,
+			  struct kernel_lb_addr *eloc, uint32_t elen, int inc);
 extern int udf_add_aext(struct inode *, struct extent_position *,
 			struct kernel_lb_addr *, uint32_t, int);
 extern void udf_write_aext(struct inode *, struct extent_position *,