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 49c010d1ffSEric W. Biederman kuid_t s_uid; /* owner uid */ 50c010d1ffSEric W. Biederman kgid_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 */ 53da23ef05SStuart Swales int s_ftsuffix; /* ,xyz hex filetype suffix option */ 54608ba50bSAl Viro 55608ba50bSAl Viro __u32 s_ids_per_zone; /* max. no ids in one zone */ 56608ba50bSAl Viro __u32 s_idlen; /* length of ID in map */ 57608ba50bSAl Viro __u32 s_map_size; /* sector size of a map */ 58608ba50bSAl Viro unsigned long s_size; /* total size (in blocks) of this fs */ 59608ba50bSAl Viro signed int s_map2blk; /* shift left by this for map->sector */ 60608ba50bSAl Viro unsigned int s_log2sharesize;/* log2 share size */ 61608ba50bSAl Viro __le32 s_version; /* disc format version */ 62608ba50bSAl Viro unsigned int s_namelen; /* maximum number of characters in name */ 63608ba50bSAl Viro }; 64608ba50bSAl Viro 65608ba50bSAl Viro static inline struct adfs_sb_info *ADFS_SB(struct super_block *sb) 66608ba50bSAl Viro { 67608ba50bSAl Viro return sb->s_fs_info; 68608ba50bSAl Viro } 69608ba50bSAl Viro 70608ba50bSAl Viro static inline struct adfs_inode_info *ADFS_I(struct inode *inode) 71608ba50bSAl Viro { 72608ba50bSAl Viro return container_of(inode, struct adfs_inode_info, vfs_inode); 73608ba50bSAl Viro } 74608ba50bSAl Viro 75608ba50bSAl Viro /* 761da177e4SLinus Torvalds * Directory handling 771da177e4SLinus Torvalds */ 781da177e4SLinus Torvalds struct adfs_dir { 791da177e4SLinus Torvalds struct super_block *sb; 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds int nr_buffers; 821da177e4SLinus Torvalds struct buffer_head *bh[4]; 832f09719aSStuart Swales 842f09719aSStuart Swales /* big directories need allocated buffers */ 852f09719aSStuart Swales struct buffer_head **bh_fplus; 862f09719aSStuart Swales 871da177e4SLinus Torvalds unsigned int pos; 881da177e4SLinus Torvalds unsigned int parent_id; 891da177e4SLinus Torvalds 901da177e4SLinus Torvalds struct adfs_dirheader dirhead; 911da177e4SLinus Torvalds union adfs_dirtail dirtail; 921da177e4SLinus Torvalds }; 931da177e4SLinus Torvalds 941da177e4SLinus Torvalds /* 951da177e4SLinus Torvalds * This is the overall maximum name length 961da177e4SLinus Torvalds */ 97da23ef05SStuart Swales #define ADFS_MAX_NAME_LEN (256 + 4) /* +4 for ,xyz hex filetype suffix */ 981da177e4SLinus Torvalds struct object_info { 991da177e4SLinus Torvalds __u32 parent_id; /* parent object id */ 1001da177e4SLinus Torvalds __u32 file_id; /* object id */ 1011da177e4SLinus Torvalds __u32 loadaddr; /* load address */ 1021da177e4SLinus Torvalds __u32 execaddr; /* execution address */ 1031da177e4SLinus Torvalds __u32 size; /* size */ 1041da177e4SLinus Torvalds __u8 attr; /* RISC OS attributes */ 105da23ef05SStuart Swales unsigned int name_len; /* name length */ 1061da177e4SLinus Torvalds char name[ADFS_MAX_NAME_LEN];/* file name */ 107da23ef05SStuart Swales 108da23ef05SStuart Swales /* RISC OS file type (12-bit: derived from loadaddr) */ 109da23ef05SStuart Swales __u16 filetype; 1101da177e4SLinus Torvalds }; 1111da177e4SLinus Torvalds 112da23ef05SStuart Swales /* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */ 113da23ef05SStuart Swales static inline int append_filetype_suffix(char *buf, __u16 filetype) 114da23ef05SStuart Swales { 115135a9fcfSAndrew Morton if (filetype == 0xffff) /* no explicit 12-bit file type was set */ 116da23ef05SStuart Swales return 0; 117da23ef05SStuart Swales 118da23ef05SStuart Swales *buf++ = ','; 119da23ef05SStuart Swales *buf++ = hex_asc_lo(filetype >> 8); 120da23ef05SStuart Swales *buf++ = hex_asc_lo(filetype >> 4); 121da23ef05SStuart Swales *buf++ = hex_asc_lo(filetype >> 0); 122da23ef05SStuart Swales return 4; 123da23ef05SStuart Swales } 124da23ef05SStuart Swales 1251da177e4SLinus Torvalds struct adfs_dir_ops { 1261da177e4SLinus Torvalds int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir); 1271da177e4SLinus Torvalds int (*setpos)(struct adfs_dir *dir, unsigned int fpos); 1281da177e4SLinus Torvalds int (*getnext)(struct adfs_dir *dir, struct object_info *obj); 1291da177e4SLinus Torvalds int (*update)(struct adfs_dir *dir, struct object_info *obj); 1301da177e4SLinus Torvalds int (*create)(struct adfs_dir *dir, struct object_info *obj); 1311da177e4SLinus Torvalds int (*remove)(struct adfs_dir *dir, struct object_info *obj); 132ffdc9064SAl Viro int (*sync)(struct adfs_dir *dir); 1331da177e4SLinus Torvalds void (*free)(struct adfs_dir *dir); 1341da177e4SLinus Torvalds }; 1351da177e4SLinus Torvalds 1361da177e4SLinus Torvalds struct adfs_discmap { 1371da177e4SLinus Torvalds struct buffer_head *dm_bh; 1381da177e4SLinus Torvalds __u32 dm_startblk; 1391da177e4SLinus Torvalds unsigned int dm_startbit; 1401da177e4SLinus Torvalds unsigned int dm_endbit; 1411da177e4SLinus Torvalds }; 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds /* Inode stuff */ 1441da177e4SLinus Torvalds struct inode *adfs_iget(struct super_block *sb, struct object_info *obj); 145a9185b41SChristoph Hellwig int adfs_write_inode(struct inode *inode, struct writeback_control *wbc); 1461da177e4SLinus Torvalds int adfs_notify_change(struct dentry *dentry, struct iattr *attr); 1471da177e4SLinus Torvalds 1481da177e4SLinus Torvalds /* map.c */ 1491da177e4SLinus Torvalds extern int adfs_map_lookup(struct super_block *sb, unsigned int frag_id, unsigned int offset); 1501da177e4SLinus Torvalds extern unsigned int adfs_map_free(struct super_block *sb); 1511da177e4SLinus Torvalds 1521da177e4SLinus Torvalds /* Misc */ 1531da177e4SLinus Torvalds void __adfs_error(struct super_block *sb, const char *function, 1541da177e4SLinus Torvalds const char *fmt, ...); 1558e24eea7SHarvey Harrison #define adfs_error(sb, fmt...) __adfs_error(sb, __func__, fmt) 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds /* super.c */ 1581da177e4SLinus Torvalds 1591da177e4SLinus Torvalds /* 1601da177e4SLinus Torvalds * Inodes and file operations 1611da177e4SLinus Torvalds */ 1621da177e4SLinus Torvalds 1631da177e4SLinus Torvalds /* dir_*.c */ 164754661f1SArjan van de Ven extern const struct inode_operations adfs_dir_inode_operations; 1654b6f5d20SArjan van de Ven extern const struct file_operations adfs_dir_operations; 166e16404edSAl Viro extern const struct dentry_operations adfs_dentry_operations; 1671da177e4SLinus Torvalds extern struct adfs_dir_ops adfs_f_dir_ops; 1681da177e4SLinus Torvalds extern struct adfs_dir_ops adfs_fplus_dir_ops; 1691da177e4SLinus Torvalds 170ffdc9064SAl Viro extern int adfs_dir_update(struct super_block *sb, struct object_info *obj, 171ffdc9064SAl Viro int wait); 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds /* file.c */ 174754661f1SArjan van de Ven extern const struct inode_operations adfs_file_inode_operations; 1754b6f5d20SArjan van de Ven extern const struct file_operations adfs_file_operations; 1761da177e4SLinus Torvalds 177e0c93142SAdrian Bunk static inline __u32 signed_asl(__u32 val, signed int shift) 1781da177e4SLinus Torvalds { 1791da177e4SLinus Torvalds if (shift >= 0) 1801da177e4SLinus Torvalds val <<= shift; 1811da177e4SLinus Torvalds else 1821da177e4SLinus Torvalds val >>= -shift; 1831da177e4SLinus Torvalds return val; 1841da177e4SLinus Torvalds } 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds /* 1871da177e4SLinus Torvalds * Calculate the address of a block in an object given the block offset 1881da177e4SLinus Torvalds * and the object identity. 1891da177e4SLinus Torvalds * 1901da177e4SLinus Torvalds * The root directory ID should always be looked up in the map [3.4] 1911da177e4SLinus Torvalds */ 192e0c93142SAdrian Bunk static inline int 1931da177e4SLinus Torvalds __adfs_block_map(struct super_block *sb, unsigned int object_id, 1941da177e4SLinus Torvalds unsigned int block) 1951da177e4SLinus Torvalds { 1961da177e4SLinus Torvalds if (object_id & 255) { 1971da177e4SLinus Torvalds unsigned int off; 1981da177e4SLinus Torvalds 1991da177e4SLinus Torvalds off = (object_id & 255) - 1; 2001da177e4SLinus Torvalds block += off << ADFS_SB(sb)->s_log2sharesize; 2011da177e4SLinus Torvalds } 2021da177e4SLinus Torvalds 2031da177e4SLinus Torvalds return adfs_map_lookup(sb, object_id >> 8, block); 2041da177e4SLinus Torvalds } 205