Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /* SPDX-License-Identifier: GPL-2.0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) #include <linux/adfs_fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) /* Internal data structures for ADFS */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #define ADFS_FREE_FRAG		 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #define ADFS_BAD_FRAG		 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #define ADFS_ROOT_FRAG		 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #define ADFS_FILETYPE_NONE	((u16)~0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) /* RISC OS 12-bit filetype is stored in load_address[19:8] */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) static inline u16 adfs_filetype(u32 loadaddr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 	return (loadaddr & 0xfff00000) == 0xfff00000 ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	       (loadaddr >> 8) & 0xfff : ADFS_FILETYPE_NONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define ADFS_NDA_OWNER_READ	(1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define ADFS_NDA_OWNER_WRITE	(1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define ADFS_NDA_LOCKED		(1 << 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define ADFS_NDA_DIRECTORY	(1 << 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define ADFS_NDA_EXECUTE	(1 << 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define ADFS_NDA_PUBLIC_READ	(1 << 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define ADFS_NDA_PUBLIC_WRITE	(1 << 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * adfs file system inode data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) struct adfs_inode_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	loff_t		mmu_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	__u32		parent_id;	/* parent indirect disc address	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	__u32		indaddr;	/* object indirect disc address	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 	__u32		loadaddr;	/* RISC OS load address		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	__u32		execaddr;	/* RISC OS exec address		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	unsigned int	attr;		/* RISC OS permissions		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	struct inode vfs_inode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) static inline struct adfs_inode_info *ADFS_I(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	return container_of(inode, struct adfs_inode_info, vfs_inode);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) static inline bool adfs_inode_is_stamped(struct inode *inode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	return (ADFS_I(inode)->loadaddr & 0xfff00000) == 0xfff00000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)  * Forward-declare this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) struct adfs_discmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) struct adfs_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * ADFS file system superblock data in memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) struct adfs_sb_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	union { struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 		struct adfs_discmap *s_map;	/* bh list containing map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 		const struct adfs_dir_ops *s_dir; /* directory operations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 		struct rcu_head rcu;	/* used only at shutdown time	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	kuid_t		s_uid;		/* owner uid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	kgid_t		s_gid;		/* owner gid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	umode_t		s_owner_mask;	/* ADFS owner perm -> unix perm */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	umode_t		s_other_mask;	/* ADFS other perm -> unix perm	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	int		s_ftsuffix;	/* ,xyz hex filetype suffix option */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	__u32		s_ids_per_zone;	/* max. no ids in one zone */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	__u32		s_idlen;	/* length of ID in map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	__u32		s_map_size;	/* sector size of a map	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	signed int	s_map2blk;	/* shift left by this for map->sector*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	unsigned int	s_log2sharesize;/* log2 share size */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	unsigned int	s_namelen;	/* maximum number of characters in name	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return sb->s_fs_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88)  * Directory handling
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) struct adfs_dir {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct super_block	*sb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	int			nr_buffers;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct buffer_head	*bh[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct buffer_head	**bhs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	unsigned int		pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 	__u32			parent_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 		struct adfs_dirheader	*dirhead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 		struct adfs_bigdirheader *bighead;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 		struct adfs_newdirtail	*newtail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 		struct adfs_bigdirtail	*bigtail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * This is the overall maximum name length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define ADFS_MAX_NAME_LEN	(256 + 4) /* +4 for ,xyz hex filetype suffix */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) struct object_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	__u32		parent_id;		/* parent object id	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	__u32		indaddr;		/* indirect disc addr	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	__u32		loadaddr;		/* load address		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	__u32		execaddr;		/* execution address	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	__u32		size;			/* size			*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	__u8		attr;			/* RISC OS attributes	*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	unsigned int	name_len;		/* name length		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	char		name[ADFS_MAX_NAME_LEN];/* file name		*/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct adfs_dir_ops {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	int	(*read)(struct super_block *sb, unsigned int indaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			unsigned int size, struct adfs_dir *dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	int	(*iterate)(struct adfs_dir *dir, struct dir_context *ctx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	int	(*setpos)(struct adfs_dir *dir, unsigned int fpos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	int	(*getnext)(struct adfs_dir *dir, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	int	(*update)(struct adfs_dir *dir, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	int	(*create)(struct adfs_dir *dir, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	int	(*remove)(struct adfs_dir *dir, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	int	(*commit)(struct adfs_dir *dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) struct adfs_discmap {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct buffer_head	*dm_bh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	__u32			dm_startblk;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	unsigned int		dm_startbit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	unsigned int		dm_endbit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) /* Inode stuff */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) struct inode *adfs_iget(struct super_block *sb, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) int adfs_write_inode(struct inode *inode, struct writeback_control *wbc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int adfs_notify_change(struct dentry *dentry, struct iattr *attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* map.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) int adfs_map_lookup(struct super_block *sb, u32 frag_id, unsigned int offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) void adfs_map_statfs(struct super_block *sb, struct kstatfs *buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) struct adfs_discmap *adfs_read_map(struct super_block *sb, struct adfs_discrecord *dr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) void adfs_free_map(struct super_block *sb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /* Misc */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) __printf(3, 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) void __adfs_error(struct super_block *sb, const char *function,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		  const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) void adfs_msg(struct super_block *sb, const char *pfx, const char *fmt, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) /* super.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)  * Inodes and file operations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* dir_*.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) extern const struct inode_operations adfs_dir_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) extern const struct file_operations adfs_dir_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) extern const struct dentry_operations adfs_dentry_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) extern const struct adfs_dir_ops adfs_f_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) extern const struct adfs_dir_ops adfs_fplus_dir_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int adfs_dir_copyfrom(void *dst, struct adfs_dir *dir, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		      size_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) int adfs_dir_copyto(struct adfs_dir *dir, unsigned int offset, const void *src,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		    size_t len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) void adfs_dir_relse(struct adfs_dir *dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) int adfs_dir_read_buffers(struct super_block *sb, u32 indaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			  unsigned int size, struct adfs_dir *dir);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 			   int wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* file.c */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) extern const struct inode_operations adfs_file_inode_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) extern const struct file_operations adfs_file_operations;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) static inline __u32 signed_asl(__u32 val, signed int shift)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	if (shift >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		val <<= shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 		val >>= -shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	return val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  * Calculate the address of a block in an object given the block offset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)  * and the object identity.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * The root directory ID should always be looked up in the map [3.4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static inline int __adfs_block_map(struct super_block *sb, u32 indaddr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 				   unsigned int block)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	if (indaddr & 255) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		unsigned int off;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		off = (indaddr & 255) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		block += off << ADFS_SB(sb)->s_log2sharesize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	return adfs_map_lookup(sb, indaddr >> 8, block);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* Return the disc record from the map */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) static inline
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) struct adfs_discrecord *adfs_map_discrecord(struct adfs_discmap *dm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	return (void *)(dm[0].dm_bh->b_data + 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static inline u64 adfs_disc_size(const struct adfs_discrecord *dr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	return (u64)le32_to_cpu(dr->disc_size_high) << 32 |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		    le32_to_cpu(dr->disc_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) }