udf: Fix loading of special inodes
Some UDF media have special inodes (like VAT or metadata partition
inodes) whose link_count is 0. Thus commit 4071b9136223 (udf: Properly
detect stale inodes) broke loading these inodes because udf_iget()
started returning -ESTALE for them. Since we still need to properly
detect stale inodes queried by NFS, create two variants of udf_iget() -
one which is used for looking up special inodes (which ignores
link_count == 0) and one which is used for other cases which return
ESTALE when link_count == 0.
Fixes: 4071b913622316970d0e1919f7d82b4403fec5f2
CC: stable@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/udf/super.c b/fs/udf/super.c
index 5401fc3..e229315 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -959,7 +959,7 @@
addr.logicalBlockNum = meta_file_loc;
addr.partitionReferenceNum = partition_num;
- metadata_fe = udf_iget(sb, &addr);
+ metadata_fe = udf_iget_special(sb, &addr);
if (IS_ERR(metadata_fe)) {
udf_warn(sb, "metadata inode efe not found\n");
@@ -1020,7 +1020,7 @@
udf_debug("Bitmap file location: block = %d part = %d\n",
addr.logicalBlockNum, addr.partitionReferenceNum);
- fe = udf_iget(sb, &addr);
+ fe = udf_iget_special(sb, &addr);
if (IS_ERR(fe)) {
if (sb->s_flags & MS_RDONLY)
udf_warn(sb, "bitmap inode efe not found but it's ok since the disc is mounted read-only\n");
@@ -1119,7 +1119,7 @@
};
struct inode *inode;
- inode = udf_iget(sb, &loc);
+ inode = udf_iget_special(sb, &loc);
if (IS_ERR(inode)) {
udf_debug("cannot load unallocSpaceTable (part %d)\n",
p_index);
@@ -1154,7 +1154,7 @@
};
struct inode *inode;
- inode = udf_iget(sb, &loc);
+ inode = udf_iget_special(sb, &loc);
if (IS_ERR(inode)) {
udf_debug("cannot load freedSpaceTable (part %d)\n",
p_index);
@@ -1198,7 +1198,7 @@
vat_block >= map->s_partition_root &&
vat_block >= start_block - 3; vat_block--) {
ino.logicalBlockNum = vat_block - map->s_partition_root;
- inode = udf_iget(sb, &ino);
+ inode = udf_iget_special(sb, &ino);
if (!IS_ERR(inode)) {
sbi->s_vat_inode = inode;
break;