v4.19.13 snapshot.
diff --git a/fs/udf/udf_sb.h b/fs/udf/udf_sb.h
new file mode 100644
index 0000000..d12e507
--- /dev/null
+++ b/fs/udf/udf_sb.h
@@ -0,0 +1,189 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_UDF_SB_H
+#define __LINUX_UDF_SB_H
+
+#include <linux/mutex.h>
+#include <linux/bitops.h>
+#include <linux/magic.h>
+
+#define UDF_MAX_READ_VERSION 0x0250
+#define UDF_MAX_WRITE_VERSION 0x0201
+
+#define UDF_FLAG_USE_EXTENDED_FE 0
+#define UDF_VERS_USE_EXTENDED_FE 0x0200
+#define UDF_FLAG_USE_STREAMS 1
+#define UDF_VERS_USE_STREAMS 0x0200
+#define UDF_FLAG_USE_SHORT_AD 2
+#define UDF_FLAG_USE_AD_IN_ICB 3
+#define UDF_FLAG_USE_FILE_CTIME_EA 4
+#define UDF_FLAG_STRICT 5
+#define UDF_FLAG_UNDELETE 6
+#define UDF_FLAG_UNHIDE 7
+#define UDF_FLAG_VARCONV 8
+#define UDF_FLAG_NLS_MAP 9
+#define UDF_FLAG_UTF8 10
+#define UDF_FLAG_UID_FORGET 11 /* save -1 for uid to disk */
+#define UDF_FLAG_GID_FORGET 12
+#define UDF_FLAG_UID_SET 13
+#define UDF_FLAG_GID_SET 14
+#define UDF_FLAG_SESSION_SET 15
+#define UDF_FLAG_LASTBLOCK_SET 16
+#define UDF_FLAG_BLOCKSIZE_SET 17
+#define UDF_FLAG_INCONSISTENT 18
+#define UDF_FLAG_RW_INCOMPAT 19 /* Set when we find RW incompatible
+ * feature */
+
+#define UDF_PART_FLAG_UNALLOC_BITMAP 0x0001
+#define UDF_PART_FLAG_UNALLOC_TABLE 0x0002
+#define UDF_PART_FLAG_FREED_BITMAP 0x0004
+#define UDF_PART_FLAG_FREED_TABLE 0x0008
+#define UDF_PART_FLAG_READ_ONLY 0x0010
+#define UDF_PART_FLAG_WRITE_ONCE 0x0020
+#define UDF_PART_FLAG_REWRITABLE 0x0040
+#define UDF_PART_FLAG_OVERWRITABLE 0x0080
+
+#define UDF_MAX_BLOCK_LOADED 8
+
+#define UDF_TYPE1_MAP15 0x1511U
+#define UDF_VIRTUAL_MAP15 0x1512U
+#define UDF_VIRTUAL_MAP20 0x2012U
+#define UDF_SPARABLE_MAP15 0x1522U
+#define UDF_METADATA_MAP25 0x2511U
+
+#define UDF_INVALID_MODE ((umode_t)-1)
+
+#pragma pack(1) /* XXX(hch): Why? This file just defines in-core structures */
+
+#define MF_DUPLICATE_MD 0x01
+#define MF_MIRROR_FE_LOADED 0x02
+
+struct udf_meta_data {
+ __u32 s_meta_file_loc;
+ __u32 s_mirror_file_loc;
+ __u32 s_bitmap_file_loc;
+ __u32 s_alloc_unit_size;
+ __u16 s_align_unit_size;
+ /*
+ * Partition Reference Number of the associated physical / sparable
+ * partition
+ */
+ __u16 s_phys_partition_ref;
+ int s_flags;
+ struct inode *s_metadata_fe;
+ struct inode *s_mirror_fe;
+ struct inode *s_bitmap_fe;
+};
+
+struct udf_sparing_data {
+ __u16 s_packet_len;
+ struct buffer_head *s_spar_map[4];
+};
+
+struct udf_virtual_data {
+ __u32 s_num_entries;
+ __u16 s_start_offset;
+};
+
+struct udf_bitmap {
+ __u32 s_extPosition;
+ int s_nr_groups;
+ struct buffer_head *s_block_bitmap[0];
+};
+
+struct udf_part_map {
+ union {
+ struct udf_bitmap *s_bitmap;
+ struct inode *s_table;
+ } s_uspace;
+ union {
+ struct udf_bitmap *s_bitmap;
+ struct inode *s_table;
+ } s_fspace;
+ __u32 s_partition_root;
+ __u32 s_partition_len;
+ __u16 s_partition_type;
+ __u16 s_partition_num;
+ union {
+ struct udf_sparing_data s_sparing;
+ struct udf_virtual_data s_virtual;
+ struct udf_meta_data s_metadata;
+ } s_type_specific;
+ __u32 (*s_partition_func)(struct super_block *, __u32, __u16, __u32);
+ __u16 s_volumeseqnum;
+ __u16 s_partition_flags;
+};
+
+#pragma pack()
+
+struct udf_sb_info {
+ struct udf_part_map *s_partmaps;
+ __u8 s_volume_ident[32];
+
+ /* Overall info */
+ __u16 s_partitions;
+ __u16 s_partition;
+
+ /* Sector headers */
+ __s32 s_session;
+ __u32 s_anchor;
+ __u32 s_last_block;
+
+ struct buffer_head *s_lvid_bh;
+
+ /* Default permissions */
+ umode_t s_umask;
+ kgid_t s_gid;
+ kuid_t s_uid;
+ umode_t s_fmode;
+ umode_t s_dmode;
+ /* Lock protecting consistency of above permission settings */
+ rwlock_t s_cred_lock;
+
+ /* Root Info */
+ struct timespec64 s_record_time;
+
+ /* Fileset Info */
+ __u16 s_serial_number;
+
+ /* highest UDF revision we have recorded to this media */
+ __u16 s_udfrev;
+
+ /* Miscellaneous flags */
+ unsigned long s_flags;
+
+ /* Encoding info */
+ struct nls_table *s_nls_map;
+
+ /* VAT inode */
+ struct inode *s_vat_inode;
+
+ struct mutex s_alloc_mutex;
+ /* Protected by s_alloc_mutex */
+ unsigned int s_lvid_dirty;
+};
+
+static inline struct udf_sb_info *UDF_SB(struct super_block *sb)
+{
+ return sb->s_fs_info;
+}
+
+struct logicalVolIntegrityDescImpUse *udf_sb_lvidiu(struct super_block *sb);
+
+int udf_compute_nr_groups(struct super_block *sb, u32 partition);
+
+static inline int UDF_QUERY_FLAG(struct super_block *sb, int flag)
+{
+ return test_bit(flag, &UDF_SB(sb)->s_flags);
+}
+
+static inline void UDF_SET_FLAG(struct super_block *sb, int flag)
+{
+ set_bit(flag, &UDF_SB(sb)->s_flags);
+}
+
+static inline void UDF_CLEAR_FLAG(struct super_block *sb, int flag)
+{
+ clear_bit(flag, &UDF_SB(sb)->s_flags);
+}
+
+#endif /* __LINUX_UDF_SB_H */