11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/hpfs/inode.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 51da177e4SLinus Torvalds * 61da177e4SLinus Torvalds * inode VFS functions 71da177e4SLinus Torvalds */ 81da177e4SLinus Torvalds 91da177e4SLinus Torvalds #include "hpfs_fn.h" 101da177e4SLinus Torvalds 111da177e4SLinus Torvalds void hpfs_init_inode(struct inode *i) 121da177e4SLinus Torvalds { 131da177e4SLinus Torvalds struct super_block *sb = i->i_sb; 141da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 151da177e4SLinus Torvalds 161da177e4SLinus Torvalds i->i_uid = hpfs_sb(sb)->sb_uid; 171da177e4SLinus Torvalds i->i_gid = hpfs_sb(sb)->sb_gid; 181da177e4SLinus Torvalds i->i_mode = hpfs_sb(sb)->sb_mode; 191da177e4SLinus Torvalds hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv; 201da177e4SLinus Torvalds i->i_size = -1; 211da177e4SLinus Torvalds i->i_blocks = -1; 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds hpfs_inode->i_dno = 0; 241da177e4SLinus Torvalds hpfs_inode->i_n_secs = 0; 251da177e4SLinus Torvalds hpfs_inode->i_file_sec = 0; 261da177e4SLinus Torvalds hpfs_inode->i_disk_sec = 0; 271da177e4SLinus Torvalds hpfs_inode->i_dpos = 0; 281da177e4SLinus Torvalds hpfs_inode->i_dsubdno = 0; 291da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 0; 301da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 0; 311da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 0; 321da177e4SLinus Torvalds hpfs_inode->i_ea_size = 0; 331da177e4SLinus Torvalds 341da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 351da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; 381da177e4SLinus Torvalds i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; 391da177e4SLinus Torvalds i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; 401da177e4SLinus Torvalds } 411da177e4SLinus Torvalds 421da177e4SLinus Torvalds void hpfs_read_inode(struct inode *i) 431da177e4SLinus Torvalds { 441da177e4SLinus Torvalds struct buffer_head *bh; 451da177e4SLinus Torvalds struct fnode *fnode; 461da177e4SLinus Torvalds struct super_block *sb = i->i_sb; 471da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 481da177e4SLinus Torvalds unsigned char *ea; 491da177e4SLinus Torvalds int ea_size; 501da177e4SLinus Torvalds 511da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { 521da177e4SLinus Torvalds /*i->i_mode |= S_IFREG; 531da177e4SLinus Torvalds i->i_mode &= ~0111; 541da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 551da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 561da177e4SLinus Torvalds i->i_nlink = 0;*/ 571da177e4SLinus Torvalds make_bad_inode(i); 581da177e4SLinus Torvalds return; 591da177e4SLinus Torvalds } 601da177e4SLinus Torvalds if (hpfs_sb(i->i_sb)->sb_eas) { 611da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { 621da177e4SLinus Torvalds if (ea_size == 2) { 632ef10312SAl Viro i->i_uid = le16_to_cpu(*(__le16*)ea); 641da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 651da177e4SLinus Torvalds } 661da177e4SLinus Torvalds kfree(ea); 671da177e4SLinus Torvalds } 681da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { 691da177e4SLinus Torvalds if (ea_size == 2) { 702ef10312SAl Viro i->i_gid = le16_to_cpu(*(__le16*)ea); 711da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 721da177e4SLinus Torvalds } 731da177e4SLinus Torvalds kfree(ea); 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { 761da177e4SLinus Torvalds kfree(ea); 771da177e4SLinus Torvalds i->i_mode = S_IFLNK | 0777; 781da177e4SLinus Torvalds i->i_op = &page_symlink_inode_operations; 791da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_symlink_aops; 801da177e4SLinus Torvalds i->i_nlink = 1; 811da177e4SLinus Torvalds i->i_size = ea_size; 821da177e4SLinus Torvalds i->i_blocks = 1; 831da177e4SLinus Torvalds brelse(bh); 841da177e4SLinus Torvalds return; 851da177e4SLinus Torvalds } 861da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { 871da177e4SLinus Torvalds int rdev = 0; 881da177e4SLinus Torvalds umode_t mode = hpfs_sb(sb)->sb_mode; 891da177e4SLinus Torvalds if (ea_size == 2) { 902ef10312SAl Viro mode = le16_to_cpu(*(__le16*)ea); 911da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 921da177e4SLinus Torvalds } 931da177e4SLinus Torvalds kfree(ea); 941da177e4SLinus Torvalds i->i_mode = mode; 951da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode)) { 961da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { 971da177e4SLinus Torvalds if (ea_size == 4) 982ef10312SAl Viro rdev = le32_to_cpu(*(__le32*)ea); 991da177e4SLinus Torvalds kfree(ea); 1001da177e4SLinus Torvalds } 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 1031da177e4SLinus Torvalds brelse(bh); 1041da177e4SLinus Torvalds i->i_nlink = 1; 1051da177e4SLinus Torvalds i->i_size = 0; 1061da177e4SLinus Torvalds i->i_blocks = 1; 1071da177e4SLinus Torvalds init_special_inode(i, mode, 1081da177e4SLinus Torvalds new_decode_dev(rdev)); 1091da177e4SLinus Torvalds return; 1101da177e4SLinus Torvalds } 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds if (fnode->dirflag) { 1141da177e4SLinus Torvalds unsigned n_dnodes, n_subdirs; 1151da177e4SLinus Torvalds i->i_mode |= S_IFDIR; 1161da177e4SLinus Torvalds i->i_op = &hpfs_dir_iops; 1171da177e4SLinus Torvalds i->i_fop = &hpfs_dir_ops; 1181da177e4SLinus Torvalds hpfs_inode->i_parent_dir = fnode->up; 1191da177e4SLinus Torvalds hpfs_inode->i_dno = fnode->u.external[0].disk_secno; 1201da177e4SLinus Torvalds if (hpfs_sb(sb)->sb_chk >= 2) { 1211da177e4SLinus Torvalds struct buffer_head *bh0; 1221da177e4SLinus Torvalds if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); 1231da177e4SLinus Torvalds } 1241da177e4SLinus Torvalds n_dnodes = 0; n_subdirs = 0; 1251da177e4SLinus Torvalds hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); 1261da177e4SLinus Torvalds i->i_blocks = 4 * n_dnodes; 1271da177e4SLinus Torvalds i->i_size = 2048 * n_dnodes; 1281da177e4SLinus Torvalds i->i_nlink = 2 + n_subdirs; 1291da177e4SLinus Torvalds } else { 1301da177e4SLinus Torvalds i->i_mode |= S_IFREG; 1311da177e4SLinus Torvalds if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; 1321da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 1331da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 1341da177e4SLinus Torvalds i->i_nlink = 1; 1351da177e4SLinus Torvalds i->i_size = fnode->file_size; 1361da177e4SLinus Torvalds i->i_blocks = ((i->i_size + 511) >> 9) + 1; 1371da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_aops; 1381da177e4SLinus Torvalds hpfs_i(i)->mmu_private = i->i_size; 1391da177e4SLinus Torvalds } 1401da177e4SLinus Torvalds brelse(bh); 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds 1431da177e4SLinus Torvalds static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) 1441da177e4SLinus Torvalds { 1451da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1461da177e4SLinus Torvalds /*if (fnode->acl_size_l || fnode->acl_size_s) { 1471da177e4SLinus Torvalds Some unknown structures like ACL may be in fnode, 1481da177e4SLinus Torvalds we'd better not overwrite them 1491da177e4SLinus Torvalds hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino); 1501da177e4SLinus Torvalds } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) { 1512ef10312SAl Viro __le32 ea; 1521da177e4SLinus Torvalds if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { 1531da177e4SLinus Torvalds ea = cpu_to_le32(i->i_uid); 1541da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); 1551da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 1561da177e4SLinus Torvalds } 1571da177e4SLinus Torvalds if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { 1581da177e4SLinus Torvalds ea = cpu_to_le32(i->i_gid); 1591da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); 1601da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 1611da177e4SLinus Torvalds } 1621da177e4SLinus Torvalds if (!S_ISLNK(i->i_mode)) 1631da177e4SLinus Torvalds if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) 1641da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) 1651da177e4SLinus Torvalds && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) 1661da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { 1671da177e4SLinus Torvalds ea = cpu_to_le32(i->i_mode); 1682ef10312SAl Viro /* sick, but legal */ 1691da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); 1701da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 1711da177e4SLinus Torvalds } 1721da177e4SLinus Torvalds if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { 1731da177e4SLinus Torvalds ea = cpu_to_le32(new_encode_dev(i->i_rdev)); 1741da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); 1751da177e4SLinus Torvalds } 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds 1791da177e4SLinus Torvalds void hpfs_write_inode(struct inode *i) 1801da177e4SLinus Torvalds { 1811da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1821da177e4SLinus Torvalds struct inode *parent; 1831da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 1841da177e4SLinus Torvalds if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { 1851da177e4SLinus Torvalds if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); 1861da177e4SLinus Torvalds kfree(hpfs_inode->i_rddir_off); 1871da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 1881da177e4SLinus Torvalds } 1897bf6d78dSIngo Molnar mutex_lock(&hpfs_inode->i_parent_mutex); 1901da177e4SLinus Torvalds if (!i->i_nlink) { 1917bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_parent_mutex); 1921da177e4SLinus Torvalds return; 1931da177e4SLinus Torvalds } 1941da177e4SLinus Torvalds parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); 1951da177e4SLinus Torvalds if (parent) { 1961da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 1971da177e4SLinus Torvalds if (parent->i_state & I_NEW) { 1981da177e4SLinus Torvalds hpfs_init_inode(parent); 1991da177e4SLinus Torvalds hpfs_read_inode(parent); 2001da177e4SLinus Torvalds unlock_new_inode(parent); 2011da177e4SLinus Torvalds } 2027bf6d78dSIngo Molnar mutex_lock(&hpfs_inode->i_mutex); 2031da177e4SLinus Torvalds hpfs_write_inode_nolock(i); 2047bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_mutex); 2051da177e4SLinus Torvalds iput(parent); 2061da177e4SLinus Torvalds } else { 2071da177e4SLinus Torvalds mark_inode_dirty(i); 2081da177e4SLinus Torvalds } 2097bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_parent_mutex); 2101da177e4SLinus Torvalds } 2111da177e4SLinus Torvalds 2121da177e4SLinus Torvalds void hpfs_write_inode_nolock(struct inode *i) 2131da177e4SLinus Torvalds { 2141da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 2151da177e4SLinus Torvalds struct buffer_head *bh; 2161da177e4SLinus Torvalds struct fnode *fnode; 2171da177e4SLinus Torvalds struct quad_buffer_head qbh; 2181da177e4SLinus Torvalds struct hpfs_dirent *de; 2191da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 2201da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; 2211da177e4SLinus Torvalds if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { 2221da177e4SLinus Torvalds if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { 2231da177e4SLinus Torvalds brelse(bh); 2241da177e4SLinus Torvalds return; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds } else de = NULL; 2271da177e4SLinus Torvalds if (S_ISREG(i->i_mode)) { 2281da177e4SLinus Torvalds fnode->file_size = i->i_size; 2291da177e4SLinus Torvalds if (de) de->file_size = i->i_size; 2301da177e4SLinus Torvalds } else if (S_ISDIR(i->i_mode)) { 2311da177e4SLinus Torvalds fnode->file_size = 0; 2321da177e4SLinus Torvalds if (de) de->file_size = 0; 2331da177e4SLinus Torvalds } 2341da177e4SLinus Torvalds hpfs_write_inode_ea(i, fnode); 2351da177e4SLinus Torvalds if (de) { 2361da177e4SLinus Torvalds de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 2371da177e4SLinus Torvalds de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 2381da177e4SLinus Torvalds de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 2391da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2401da177e4SLinus Torvalds de->ea_size = hpfs_inode->i_ea_size; 2411da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2421da177e4SLinus Torvalds hpfs_brelse4(&qbh); 2431da177e4SLinus Torvalds } 2441da177e4SLinus Torvalds if (S_ISDIR(i->i_mode)) { 2451da177e4SLinus Torvalds if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { 2461da177e4SLinus Torvalds de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 2471da177e4SLinus Torvalds de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 2481da177e4SLinus Torvalds de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 2491da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2501da177e4SLinus Torvalds de->ea_size = /*hpfs_inode->i_ea_size*/0; 2511da177e4SLinus Torvalds de->file_size = 0; 2521da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2531da177e4SLinus Torvalds hpfs_brelse4(&qbh); 2541da177e4SLinus Torvalds } else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds mark_buffer_dirty(bh); 2571da177e4SLinus Torvalds brelse(bh); 2581da177e4SLinus Torvalds } 2591da177e4SLinus Torvalds 2601da177e4SLinus Torvalds int hpfs_notify_change(struct dentry *dentry, struct iattr *attr) 2611da177e4SLinus Torvalds { 2621da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 2631da177e4SLinus Torvalds int error=0; 2641da177e4SLinus Torvalds lock_kernel(); 2651da177e4SLinus Torvalds if ( ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) || 2661da177e4SLinus Torvalds (hpfs_sb(inode->i_sb)->sb_root == inode->i_ino) ) { 2671da177e4SLinus Torvalds error = -EINVAL; 2681da177e4SLinus Torvalds } else if ((error = inode_change_ok(inode, attr))) { 2691da177e4SLinus Torvalds } else if ((error = inode_setattr(inode, attr))) { 2701da177e4SLinus Torvalds } else { 2711da177e4SLinus Torvalds hpfs_write_inode(inode); 2721da177e4SLinus Torvalds } 2731da177e4SLinus Torvalds unlock_kernel(); 2741da177e4SLinus Torvalds return error; 2751da177e4SLinus Torvalds } 2761da177e4SLinus Torvalds 2771da177e4SLinus Torvalds void hpfs_write_if_changed(struct inode *inode) 2781da177e4SLinus Torvalds { 2791da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds if (hpfs_inode->i_dirty) 2821da177e4SLinus Torvalds hpfs_write_inode(inode); 2831da177e4SLinus Torvalds } 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds void hpfs_delete_inode(struct inode *inode) 2861da177e4SLinus Torvalds { 287fef26658SMark Fasheh truncate_inode_pages(&inode->i_data, 0); 2881da177e4SLinus Torvalds lock_kernel(); 2891da177e4SLinus Torvalds hpfs_remove_fnode(inode->i_sb, inode->i_ino); 2901da177e4SLinus Torvalds unlock_kernel(); 2911da177e4SLinus Torvalds clear_inode(inode); 2921da177e4SLinus Torvalds } 293