udf: Handle VAT packed inside inode properly

We didn't handle VAT packed inside the inode - we tried to call udf_block_map()
on such file which lead to strange results at best. Add proper handling of
packed VAT as we do it with other packed files.

Signed-off-by: Jan Kara <jack@suse.cz>

1 files changed, 7 insertions, 3 deletions

diff --git a/fs/udf/partition.c b/fs/udf/partition.c
index 307c9c33d184..b2e6e1eddb90 100644
--- a/fs/udf/partition.c
+++ b/fs/udf/partition.c
@@ -54,11 +54,10 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
         struct udf_sb_info *sbi = UDF_SB(sb);
         struct udf_part_map *map;
         struct udf_virtual_data *vdata;
-        struct udf_inode_info *iinfo;
+        struct udf_inode_info *iinfo = UDF_I(sbi->s_vat_inode);
 
         map = &sbi->s_partmaps[partition];
         vdata = &map->s_type_specific.s_virtual;
-        index = (sb->s_blocksize - vdata->s_start_offset) / sizeof(uint32_t);
 
         if (block > vdata->s_num_entries) {
                 udf_debug("Trying to access block beyond end of VAT "
@@ -66,6 +65,11 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
                 return 0xFFFFFFFF;
         }
 
+        if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
+                loc = le32_to_cpu(((__le32 *)iinfo->i_ext.i_data)[block]);
+                goto translate;
+        }
+        index = (sb->s_blocksize - vdata->s_start_offset) / sizeof(uint32_t);
         if (block >= index) {
                 block -= index;
                 newblock = 1 + (block / (sb->s_blocksize / sizeof(uint32_t)));
@@ -88,7 +92,7 @@ uint32_t udf_get_pblock_virt15(struct super_block *sb, uint32_t block,
 
         brelse(bh);
 
-        iinfo = UDF_I(sbi->s_vat_inode);
+translate:
         if (iinfo->i_location.partitionReferenceNum == partition) {
                 udf_debug("recursive call to udf_get_pblock!\n");
                 return 0xFFFFFFFF;