struct inode *affs_iget(struct super_block *sb, unsigned long ino) { struct affs_sb_info *sbi = AFFS_SB(sb); struct buffer_head *bh; // struct affs_head *head; struct affs_tail *tail; struct inode *inode; u32 block; u32 size; u32 prot; u16 id; inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; pr_debug("AFFS: affs_iget(%lu)\n", inode->i_ino); block = inode->i_ino; bh = affs_bread(sb, block); if (!bh) { affs_warning(sb, "read_inode", "Cannot read block %d", block); goto bad_inode; } if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { affs_warning(sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d", AFFS_HEAD(bh)->ptype, block); goto bad_inode; } // head = AFFS_HEAD(bh); tail = AFFS_TAIL(sb, bh); prot = be32_to_cpu(tail->protect); inode->i_size = 0; inode->i_nlink = 1; inode->i_mode = 0; AFFS_I(inode)->i_extcnt = 1; AFFS_I(inode)->i_ext_last = ~1; AFFS_I(inode)->i_protect = prot; atomic_set(&AFFS_I(inode)->i_opencnt, 0); AFFS_I(inode)->i_blkcnt = 0; AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_lc_size = 0; AFFS_I(inode)->i_lc_shift = 0; AFFS_I(inode)->i_lc_mask = 0; AFFS_I(inode)->i_ac = NULL; AFFS_I(inode)->i_ext_bh = NULL; AFFS_I(inode)->mmu_private = 0; AFFS_I(inode)->i_lastalloc = 0; AFFS_I(inode)->i_pa_cnt = 0; if (sbi->s_flags & SF_SETMODE) inode->i_mode = sbi->s_mode; else inode->i_mode = prot_to_mode(prot); id = be16_to_cpu(tail->uid); if (id == 0 || sbi->s_flags & SF_SETUID) inode->i_uid = sbi->s_uid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(tail->gid); if (id == 0 || sbi->s_flags & SF_SETGID) inode->i_gid = sbi->s_gid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(tail->stype)) { case ST_ROOT: inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; /* fall through */ case ST_USERDIR: if (be32_to_cpu(tail->stype) == ST_USERDIR || sbi->s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; /* Maybe it should be controlled by mount parameter? */ //inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; inode->i_fop = &affs_dir_operations; break; case ST_LINKDIR: #if 0 affs_warning(sb, "read_inode", "inode is LINKDIR"); goto bad_inode; #else inode->i_mode |= S_IFDIR; /* ... and leave ->i_op and ->i_fop pointing to empty */ break; #endif case ST_LINKFILE: affs_warning(sb, "read_inode", "inode is LINKFILE"); goto bad_inode; case ST_FILE: size = be32_to_cpu(tail->size); inode->i_mode |= S_IFREG; AFFS_I(inode)->mmu_private = inode->i_size = size; if (inode->i_size) { AFFS_I(inode)->i_blkcnt = (size - 1) / sbi->s_data_blksize + 1; AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / sbi->s_hashsize + 1; } if (tail->link_chain) inode->i_nlink = 2; inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops; inode->i_op = &affs_file_inode_operations; inode->i_fop = &affs_file_operations; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_op = &affs_symlink_inode_operations; inode->i_data.a_ops = &affs_symlink_aops; break; } inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; affs_brelse(bh); unlock_new_inode(inode); return inode; bad_inode: affs_brelse(bh); iget_failed(inode); return ERR_PTR(-EIO); }
void affs_read_inode(struct inode *inode) { struct buffer_head *bh; struct file_front *file_front; struct file_end *file_end; s32 block; unsigned long prot; s32 ptype, stype; unsigned short id; pr_debug("AFFS: read_inode(%lu)\n",inode->i_ino); block = inode->i_ino; if (!(bh = affs_bread(inode->i_dev,block,AFFS_I2BSIZE(inode)))) { affs_error(inode->i_sb,"read_inode","Cannot read block %d",block); return; } if (affs_checksum_block(AFFS_I2BSIZE(inode),bh->b_data,&ptype,&stype) || ptype != T_SHORT) { affs_error(inode->i_sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d",ptype,block); affs_brelse(bh); return; } file_front = (struct file_front *)bh->b_data; file_end = GET_END_PTR(struct file_end, bh->b_data,AFFS_I2BSIZE(inode)); prot = (be32_to_cpu(file_end->protect) & ~0x10) ^ FIBF_OWNER; inode->u.affs_i.i_protect = prot; inode->u.affs_i.i_parent = be32_to_cpu(file_end->parent); inode->u.affs_i.i_original = 0; inode->u.affs_i.i_zone = 0; inode->u.affs_i.i_hlink = 0; inode->u.affs_i.i_pa_cnt = 0; inode->u.affs_i.i_pa_next = 0; inode->u.affs_i.i_pa_last = 0; inode->u.affs_i.i_ec = NULL; inode->u.affs_i.i_lastblock = -1; inode->i_nlink = 1; inode->i_mode = 0; if (inode->i_sb->u.affs_sb.s_flags & SF_SETMODE) inode->i_mode = inode->i_sb->u.affs_sb.s_mode; else inode->i_mode = prot_to_mode(prot); if (inode->i_sb->u.affs_sb.s_flags & SF_SETUID) inode->i_uid = inode->i_sb->u.affs_sb.s_uid; id = be16_to_cpu(file_end->owner_uid); if (id == 0 || inode->i_sb->u.affs_sb.s_flags & SF_SETUID) inode->i_uid = inode->i_sb->u.affs_sb.s_uid; else if (id == 0xFFFF && inode->i_sb->u.affs_sb.s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(file_end->owner_gid); if (id == 0 || inode->i_sb->u.affs_sb.s_flags & SF_SETGID) inode->i_gid = inode->i_sb->u.affs_sb.s_gid; else if (id == 0xFFFF && inode->i_sb->u.affs_sb.s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(file_end->secondary_type)) { case ST_ROOT: inode->i_uid = inode->i_sb->u.affs_sb.s_uid; inode->i_gid = inode->i_sb->u.affs_sb.s_gid; case ST_USERDIR: if (be32_to_cpu(file_end->secondary_type) == ST_USERDIR || inode->i_sb->u.affs_sb.s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; inode->i_size = 0; break; case ST_LINKDIR: affs_error(inode->i_sb,"read_inode","inode is LINKDIR"); affs_brelse(bh); return; case ST_LINKFILE: affs_error(inode->i_sb,"read_inode","inode is LINKFILE"); affs_brelse(bh); return; case ST_FILE: inode->i_mode |= S_IFREG; inode->i_size = be32_to_cpu(file_end->byte_size); if (inode->i_sb->u.affs_sb.s_flags & SF_OFS) block = AFFS_I2BSIZE(inode) - 24; else block = AFFS_I2BSIZE(inode); inode->u.affs_i.i_lastblock = ((inode->i_size + block - 1) / block) - 1; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_size = 0; break; } inode->i_mtime = inode->i_atime = inode->i_ctime = (be32_to_cpu(file_end->created.ds_Days) * (24 * 60 * 60) + be32_to_cpu(file_end->created.ds_Minute) * 60 + be32_to_cpu(file_end->created.ds_Tick) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; affs_brelse(bh); inode->i_op = NULL; if (S_ISREG(inode->i_mode)) { if (inode->i_sb->u.affs_sb.s_flags & SF_OFS) { inode->i_op = &affs_file_inode_operations_ofs; } else { inode->i_op = &affs_file_inode_operations; } } else if (S_ISDIR(inode->i_mode)) { /* Maybe it should be controlled by mount parameter? */ inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; } else if (S_ISLNK(inode->i_mode)) inode->i_op = &affs_symlink_inode_operations; }