1608ba50bSAl Viro #include <linux/fs.h> 2608ba50bSAl Viro #include <linux/adfs_fs.h> 3608ba50bSAl Viro 41da177e4SLinus Torvalds /* Internal data structures for ADFS */ 51da177e4SLinus Torvalds 61da177e4SLinus Torvalds #define ADFS_FREE_FRAG 0 71da177e4SLinus Torvalds #define ADFS_BAD_FRAG 1 81da177e4SLinus Torvalds #define ADFS_ROOT_FRAG 2 91da177e4SLinus Torvalds 101da177e4SLinus Torvalds #define ADFS_NDA_OWNER_READ (1 << 0) 111da177e4SLinus Torvalds #define ADFS_NDA_OWNER_WRITE (1 << 1) 121da177e4SLinus Torvalds #define ADFS_NDA_LOCKED (1 << 2) 131da177e4SLinus Torvalds #define ADFS_NDA_DIRECTORY (1 << 3) 141da177e4SLinus Torvalds #define ADFS_NDA_EXECUTE (1 << 4) 151da177e4SLinus Torvalds #define ADFS_NDA_PUBLIC_READ (1 << 5) 161da177e4SLinus Torvalds #define ADFS_NDA_PUBLIC_WRITE (1 << 6) 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds #include "dir_f.h" 191da177e4SLinus Torvalds 201da177e4SLinus Torvalds struct buffer_head; 211da177e4SLinus Torvalds 221da177e4SLinus Torvalds /* 23608ba50bSAl Viro * adfs file system inode data in memory 24608ba50bSAl Viro */ 25608ba50bSAl Viro struct adfs_inode_info { 26608ba50bSAl Viro loff_t mmu_private; 27608ba50bSAl Viro unsigned long parent_id; /* object id of parent */ 28608ba50bSAl Viro __u32 loadaddr; /* RISC OS load address */ 29608ba50bSAl Viro __u32 execaddr; /* RISC OS exec address */ 30608ba50bSAl Viro unsigned int filetype; /* RISC OS file type */ 31608ba50bSAl Viro unsigned int attr; /* RISC OS permissions */ 32608ba50bSAl Viro unsigned int stamped:1; /* RISC OS file has date/time */ 33608ba50bSAl Viro struct inode vfs_inode; 34608ba50bSAl Viro }; 35608ba50bSAl Viro 36608ba50bSAl Viro /* 37608ba50bSAl Viro * Forward-declare this 38608ba50bSAl Viro */ 39608ba50bSAl Viro struct adfs_discmap; 40608ba50bSAl Viro struct adfs_dir_ops; 41608ba50bSAl Viro 42608ba50bSAl Viro /* 43608ba50bSAl Viro * ADFS file system superblock data in memory 44608ba50bSAl Viro */ 45608ba50bSAl Viro struct adfs_sb_info { 46608ba50bSAl Viro struct adfs_discmap *s_map; /* bh list containing map */ 47608ba50bSAl Viro struct adfs_dir_ops *s_dir; /* directory operations */ 48608ba50bSAl Viro 49608ba50bSAl Viro uid_t s_uid; /* owner uid */ 50608ba50bSAl Viro gid_t s_gid; /* owner gid */ 51608ba50bSAl Viro umode_t s_owner_mask; /* ADFS owner perm -> unix perm */ 52608ba50bSAl Viro umode_t s_other_mask; /* ADFS other perm -> unix perm */ 53608ba50bSAl Viro 54608ba50bSAl Viro __u32 s_ids_per_zone; /* max. no ids in one zone */ 55608ba50bSAl Viro __u32 s_idlen; /* length of ID in map */ 56608ba50bSAl Viro __u32 s_map_size; /* sector size of a map */ 57608ba50bSAl Viro unsigned long s_size; /* total size (in blocks) of this fs */ 58608ba50bSAl Viro signed int s_map2blk; /* shift left by this for map->sector */ 59608ba50bSAl Viro unsigned int s_log2sharesize;/* log2 share size */ 60608ba50bSAl Viro __le32 s_version; /* disc format version */ 61608ba50bSAl Viro unsigned int s_namelen; /* maximum number of characters in name */ 62608ba50bSAl Viro }; 63608ba50bSAl Viro 64608ba50bSAl Viro static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb) 65608ba50bSAl Viro { 66608ba50bSAl Viro return sb->s_fs_info; 67608ba50bSAl Viro } 68608ba50bSAl Viro 69608ba50bSAl Viro static inline struct adfs_inode_info *ADFS_I(struct inode *inode) 70608ba50bSAl Viro { 71608ba50bSAl Viro return container_of(inode, struct adfs_inode_info, vfs_inode); 72608ba50bSAl Viro } 73608ba50bSAl Viro 74608ba50bSAl Viro /* 751da177e4SLinus Torvalds * Directory handling 761da177e4SLinus Torvalds */ 771da177e4SLinus Torvalds struct adfs_dir { 781da177e4SLinus Torvalds struct super_block *sb; 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds int nr_buffers; 811da177e4SLinus Torvalds struct buffer_head *bh[4]; 821da177e4SLinus Torvalds unsigned int pos; 831da177e4SLinus Torvalds unsigned int parent_id; 841da177e4SLinus Torvalds 851da177e4SLinus Torvalds struct adfs_dirheader dirhead; 861da177e4SLinus Torvalds union adfs_dirtail dirtail; 871da177e4SLinus Torvalds }; 881da177e4SLinus Torvalds 891da177e4SLinus Torvalds /* 901da177e4SLinus Torvalds * This is the overall maximum name length 911da177e4SLinus Torvalds */ 921da177e4SLinus Torvalds #define ADFS_MAX_NAME_LEN 256 931da177e4SLinus Torvalds struct object_info { 941da177e4SLinus Torvalds __u32 parent_id; /* parent object id */ 951da177e4SLinus Torvalds __u32 file_id; /* object id */ 961da177e4SLinus Torvalds __u32 loadaddr; /* load address */ 971da177e4SLinus Torvalds __u32 execaddr; /* execution address */ 981da177e4SLinus Torvalds __u32 size; /* size */ 991da177e4SLinus Torvalds __u8 attr; /* RISC OS attributes */ 1001da177e4SLinus Torvalds unsigned char name_len; /* name length */ 1011da177e4SLinus Torvalds char name[ADFS_MAX_NAME_LEN];/* file name */ 1021da177e4SLinus Torvalds }; 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds struct adfs_dir_ops { 1051da177e4SLinus Torvalds int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir); 1061da177e4SLinus Torvalds int (*setpos)(struct adfs_dir *dir, unsigned int fpos); 1071da177e4SLinus Torvalds int (*getnext)(struct adfs_dir *dir, struct object_info *obj); 1081da177e4SLinus Torvalds int (*update)(struct adfs_dir *dir, struct object_info *obj); 1091da177e4SLinus Torvalds int (*create)(struct adfs_dir *dir, struct object_info *obj); 1101da177e4SLinus Torvalds int (*remove)(struct adfs_dir *dir, struct object_info *obj); 111ffdc9064SAl Viro int (*sync)(struct adfs_dir *dir); 1121da177e4SLinus Torvalds void (*free)(struct adfs_dir *dir); 1131da177e4SLinus Torvalds }; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds struct adfs_discmap { 1161da177e4SLinus Torvalds struct buffer_head *dm_bh; 1171da177e4SLinus Torvalds __u32 dm_startblk; 1181da177e4SLinus Torvalds unsigned int dm_startbit; 1191da177e4SLinus Torvalds unsigned int dm_endbit; 1201da177e4SLinus Torvalds }; 1211da177e4SLinus Torvalds 1221da177e4SLinus Torvalds /* Inode stuff */ 1231da177e4SLinus Torvalds struct inode *adfs_iget(struct super_block *sb, struct object_info *obj); 124a9185b41SChristoph Hellwig int adfs_write_inode(struct inode *inode, struct writeback_control *wbc); 1251da177e4SLinus Torvalds int adfs_notify_change(struct dentry *dentry, struct iattr *attr); 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds /* map.c */ 1281da177e4SLinus Torvalds extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset); 1291da177e4SLinus Torvalds extern unsigned int adfs_map_free(struct super_block *sb); 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds /* Misc */ 1321da177e4SLinus Torvalds void __adfs_error(struct super_block *sb, const char *function, 1331da177e4SLinus Torvalds const char *fmt, ...); 1348e24eea7SHarvey Harrison #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt) 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds /* super.c */ 1371da177e4SLinus Torvalds 1381da177e4SLinus Torvalds /* 1391da177e4SLinus Torvalds * Inodes and file operations 1401da177e4SLinus Torvalds */ 1411da177e4SLinus Torvalds 1421da177e4SLinus Torvalds /* dir_*.c */ 143754661f1SArjan van de Ven extern const struct inode_operations adfs_dir_inode_operations; 1444b6f5d20SArjan van de Ven extern const struct file_operations adfs_dir_operations; 145e16404edSAl Viro extern const struct dentry_operations adfs_dentry_operations; 1461da177e4SLinus Torvalds extern struct adfs_dir_ops adfs_f_dir_ops; 1471da177e4SLinus Torvalds extern struct adfs_dir_ops adfs_fplus_dir_ops; 1481da177e4SLinus Torvalds 149ffdc9064SAl Viro extern int adfs_dir_update(struct super_block *sb, struct object_info *obj, 150ffdc9064SAl Viro int wait); 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* file.c */ 153754661f1SArjan van de Ven extern const struct inode_operations adfs_file_inode_operations; 1544b6f5d20SArjan van de Ven extern const struct file_operations adfs_file_operations; 1551da177e4SLinus Torvalds 156e0c93142SAdrian Bunk static inline __u32 signed_asl(__u32 val, signed int shift) 1571da177e4SLinus Torvalds { 1581da177e4SLinus Torvalds if (shift >= 0) 1591da177e4SLinus Torvalds val <<= shift; 1601da177e4SLinus Torvalds else 1611da177e4SLinus Torvalds val >>= -shift; 1621da177e4SLinus Torvalds return val; 1631da177e4SLinus Torvalds } 1641da177e4SLinus Torvalds 1651da177e4SLinus Torvalds /* 1661da177e4SLinus Torvalds * Calculate the address of a block in an object given the block offset 1671da177e4SLinus Torvalds * and the object identity. 1681da177e4SLinus Torvalds * 1691da177e4SLinus Torvalds * The root directory ID should always be looked up in the map [3.4] 1701da177e4SLinus Torvalds */ 171e0c93142SAdrian Bunk static inline int 1721da177e4SLinus Torvalds __adfs_block_map(struct super_block *sb, unsigned int object_id, 1731da177e4SLinus Torvalds unsigned int block) 1741da177e4SLinus Torvalds { 1751da177e4SLinus Torvalds if (object_id & 255) { 1761da177e4SLinus Torvalds unsigned int off; 1771da177e4SLinus Torvalds 1781da177e4SLinus Torvalds off = (object_id & 255) - 1; 1791da177e4SLinus Torvalds block += off << ADFS_SB(sb)->s_log2sharesize; 1801da177e4SLinus Torvalds } 1811da177e4SLinus Torvalds 1821da177e4SLinus Torvalds return adfs_map_lookup(sb, object_id >> 8, block); 1831da177e4SLinus Torvalds } 184