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 95a0e3ad6STejun Heo #include <linux/slab.h> 100e1a43c7SEric W. Biederman #include <linux/user_namespace.h> 111da177e4SLinus Torvalds #include "hpfs_fn.h" 121da177e4SLinus Torvalds 131da177e4SLinus Torvalds void hpfs_init_inode(struct inode *i) 141da177e4SLinus Torvalds { 151da177e4SLinus Torvalds struct super_block *sb = i->i_sb; 161da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 171da177e4SLinus Torvalds 181da177e4SLinus Torvalds i->i_uid = hpfs_sb(sb)->sb_uid; 191da177e4SLinus Torvalds i->i_gid = hpfs_sb(sb)->sb_gid; 201da177e4SLinus Torvalds i->i_mode = hpfs_sb(sb)->sb_mode; 211da177e4SLinus Torvalds i->i_size = -1; 221da177e4SLinus Torvalds i->i_blocks = -1; 231da177e4SLinus Torvalds 241da177e4SLinus Torvalds hpfs_inode->i_dno = 0; 251da177e4SLinus Torvalds hpfs_inode->i_n_secs = 0; 261da177e4SLinus Torvalds hpfs_inode->i_file_sec = 0; 271da177e4SLinus Torvalds hpfs_inode->i_disk_sec = 0; 281da177e4SLinus Torvalds hpfs_inode->i_dpos = 0; 291da177e4SLinus Torvalds hpfs_inode->i_dsubdno = 0; 301da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 0; 311da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 0; 321da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 0; 331da177e4SLinus Torvalds hpfs_inode->i_ea_size = 0; 341da177e4SLinus Torvalds 351da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 361da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 371da177e4SLinus Torvalds 381da177e4SLinus Torvalds i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; 391da177e4SLinus Torvalds i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; 401da177e4SLinus Torvalds i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; 411da177e4SLinus Torvalds } 421da177e4SLinus Torvalds 431da177e4SLinus Torvalds void hpfs_read_inode(struct inode *i) 441da177e4SLinus Torvalds { 451da177e4SLinus Torvalds struct buffer_head *bh; 461da177e4SLinus Torvalds struct fnode *fnode; 471da177e4SLinus Torvalds struct super_block *sb = i->i_sb; 481da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 497e7742eeSAl Viro void *ea; 501da177e4SLinus Torvalds int ea_size; 511da177e4SLinus Torvalds 521da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { 531da177e4SLinus Torvalds /*i->i_mode |= S_IFREG; 541da177e4SLinus Torvalds i->i_mode &= ~0111; 551da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 561da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 576d6b77f1SMiklos Szeredi clear_nlink(i);*/ 581da177e4SLinus Torvalds make_bad_inode(i); 591da177e4SLinus Torvalds return; 601da177e4SLinus Torvalds } 611da177e4SLinus Torvalds if (hpfs_sb(i->i_sb)->sb_eas) { 621da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { 631da177e4SLinus Torvalds if (ea_size == 2) { 640e1a43c7SEric W. Biederman i_uid_write(i, le16_to_cpu(*(__le16*)ea)); 651da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 661da177e4SLinus Torvalds } 671da177e4SLinus Torvalds kfree(ea); 681da177e4SLinus Torvalds } 691da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { 701da177e4SLinus Torvalds if (ea_size == 2) { 710e1a43c7SEric W. Biederman i_gid_write(i, le16_to_cpu(*(__le16*)ea)); 721da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 731da177e4SLinus Torvalds } 741da177e4SLinus Torvalds kfree(ea); 751da177e4SLinus Torvalds } 761da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { 771da177e4SLinus Torvalds kfree(ea); 781da177e4SLinus Torvalds i->i_mode = S_IFLNK | 0777; 791da177e4SLinus Torvalds i->i_op = &page_symlink_inode_operations; 801da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_symlink_aops; 81bfe86848SMiklos Szeredi set_nlink(i, 1); 821da177e4SLinus Torvalds i->i_size = ea_size; 831da177e4SLinus Torvalds i->i_blocks = 1; 841da177e4SLinus Torvalds brelse(bh); 851da177e4SLinus Torvalds return; 861da177e4SLinus Torvalds } 871da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { 881da177e4SLinus Torvalds int rdev = 0; 891da177e4SLinus Torvalds umode_t mode = hpfs_sb(sb)->sb_mode; 901da177e4SLinus Torvalds if (ea_size == 2) { 912ef10312SAl Viro mode = le16_to_cpu(*(__le16*)ea); 921da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 931da177e4SLinus Torvalds } 941da177e4SLinus Torvalds kfree(ea); 951da177e4SLinus Torvalds i->i_mode = mode; 961da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode)) { 971da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { 981da177e4SLinus Torvalds if (ea_size == 4) 992ef10312SAl Viro rdev = le32_to_cpu(*(__le32*)ea); 1001da177e4SLinus Torvalds kfree(ea); 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 1041da177e4SLinus Torvalds brelse(bh); 105bfe86848SMiklos Szeredi set_nlink(i, 1); 1061da177e4SLinus Torvalds i->i_size = 0; 1071da177e4SLinus Torvalds i->i_blocks = 1; 1081da177e4SLinus Torvalds init_special_inode(i, mode, 1091da177e4SLinus Torvalds new_decode_dev(rdev)); 1101da177e4SLinus Torvalds return; 1111da177e4SLinus Torvalds } 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds } 114c4c99543SAl Viro if (fnode_is_dir(fnode)) { 1157e7742eeSAl Viro int n_dnodes, n_subdirs; 1161da177e4SLinus Torvalds i->i_mode |= S_IFDIR; 1171da177e4SLinus Torvalds i->i_op = &hpfs_dir_iops; 1181da177e4SLinus Torvalds i->i_fop = &hpfs_dir_ops; 1190b69760bSMikulas Patocka hpfs_inode->i_parent_dir = le32_to_cpu(fnode->up); 1200b69760bSMikulas Patocka hpfs_inode->i_dno = le32_to_cpu(fnode->u.external[0].disk_secno); 1211da177e4SLinus Torvalds if (hpfs_sb(sb)->sb_chk >= 2) { 1221da177e4SLinus Torvalds struct buffer_head *bh0; 1231da177e4SLinus Torvalds if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); 1241da177e4SLinus Torvalds } 1251da177e4SLinus Torvalds n_dnodes = 0; n_subdirs = 0; 1261da177e4SLinus Torvalds hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); 1271da177e4SLinus Torvalds i->i_blocks = 4 * n_dnodes; 1281da177e4SLinus Torvalds i->i_size = 2048 * n_dnodes; 129bfe86848SMiklos Szeredi set_nlink(i, 2 + n_subdirs); 1301da177e4SLinus Torvalds } else { 1311da177e4SLinus Torvalds i->i_mode |= S_IFREG; 1321da177e4SLinus Torvalds if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; 1331da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 1341da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 135bfe86848SMiklos Szeredi set_nlink(i, 1); 1360b69760bSMikulas Patocka i->i_size = le32_to_cpu(fnode->file_size); 1371da177e4SLinus Torvalds i->i_blocks = ((i->i_size + 511) >> 9) + 1; 1381da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_aops; 1391da177e4SLinus Torvalds hpfs_i(i)->mmu_private = i->i_size; 1401da177e4SLinus Torvalds } 1411da177e4SLinus Torvalds brelse(bh); 1421da177e4SLinus Torvalds } 1431da177e4SLinus Torvalds 1441da177e4SLinus Torvalds static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) 1451da177e4SLinus Torvalds { 1461da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1470b69760bSMikulas Patocka /*if (le32_to_cpu(fnode->acl_size_l) || le16_to_cpu(fnode->acl_size_s)) { 1481da177e4SLinus Torvalds Some unknown structures like ACL may be in fnode, 1491da177e4SLinus Torvalds we'd better not overwrite them 1508a168ca7SMasanari Iida hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 structures", i->i_ino); 1511da177e4SLinus Torvalds } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) { 1522ef10312SAl Viro __le32 ea; 1530e1a43c7SEric W. Biederman if (!uid_eq(i->i_uid, hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { 1540e1a43c7SEric W. Biederman ea = cpu_to_le32(i_uid_read(i)); 1551da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); 1561da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 1571da177e4SLinus Torvalds } 1580e1a43c7SEric W. Biederman if (!gid_eq(i->i_gid, hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { 1590e1a43c7SEric W. Biederman ea = cpu_to_le32(i_gid_read(i)); 1601da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); 1611da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 1621da177e4SLinus Torvalds } 1631da177e4SLinus Torvalds if (!S_ISLNK(i->i_mode)) 1641da177e4SLinus Torvalds if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) 1651da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) 1661da177e4SLinus Torvalds && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) 1671da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { 1681da177e4SLinus Torvalds ea = cpu_to_le32(i->i_mode); 1692ef10312SAl Viro /* sick, but legal */ 1701da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); 1711da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 1721da177e4SLinus Torvalds } 1731da177e4SLinus Torvalds if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { 1741da177e4SLinus Torvalds ea = cpu_to_le32(new_encode_dev(i->i_rdev)); 1751da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); 1761da177e4SLinus Torvalds } 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds 1801da177e4SLinus Torvalds void hpfs_write_inode(struct inode *i) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1831da177e4SLinus Torvalds struct inode *parent; 1841da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 1851da177e4SLinus Torvalds if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { 1861da177e4SLinus Torvalds if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); 1871da177e4SLinus Torvalds kfree(hpfs_inode->i_rddir_off); 1881da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 1891da177e4SLinus Torvalds } 1901da177e4SLinus Torvalds if (!i->i_nlink) { 1911da177e4SLinus Torvalds return; 1921da177e4SLinus Torvalds } 1931da177e4SLinus Torvalds parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); 1941da177e4SLinus Torvalds if (parent) { 1951da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 1961da177e4SLinus Torvalds if (parent->i_state & I_NEW) { 1971da177e4SLinus Torvalds hpfs_init_inode(parent); 1981da177e4SLinus Torvalds hpfs_read_inode(parent); 1991da177e4SLinus Torvalds unlock_new_inode(parent); 2001da177e4SLinus Torvalds } 2011da177e4SLinus Torvalds hpfs_write_inode_nolock(i); 2021da177e4SLinus Torvalds iput(parent); 2031da177e4SLinus Torvalds } 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds void hpfs_write_inode_nolock(struct inode *i) 2071da177e4SLinus Torvalds { 2081da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 2091da177e4SLinus Torvalds struct buffer_head *bh; 2101da177e4SLinus Torvalds struct fnode *fnode; 2111da177e4SLinus Torvalds struct quad_buffer_head qbh; 2121da177e4SLinus Torvalds struct hpfs_dirent *de; 2131da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 2141da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; 2151da177e4SLinus Torvalds if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { 2161da177e4SLinus Torvalds if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { 2171da177e4SLinus Torvalds brelse(bh); 2181da177e4SLinus Torvalds return; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds } else de = NULL; 2211da177e4SLinus Torvalds if (S_ISREG(i->i_mode)) { 2220b69760bSMikulas Patocka fnode->file_size = cpu_to_le32(i->i_size); 2230b69760bSMikulas Patocka if (de) de->file_size = cpu_to_le32(i->i_size); 2241da177e4SLinus Torvalds } else if (S_ISDIR(i->i_mode)) { 2250b69760bSMikulas Patocka fnode->file_size = cpu_to_le32(0); 2260b69760bSMikulas Patocka if (de) de->file_size = cpu_to_le32(0); 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds hpfs_write_inode_ea(i, fnode); 2291da177e4SLinus Torvalds if (de) { 2300b69760bSMikulas Patocka de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec)); 2310b69760bSMikulas Patocka de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec)); 2320b69760bSMikulas Patocka de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec)); 2331da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2340b69760bSMikulas Patocka de->ea_size = cpu_to_le32(hpfs_inode->i_ea_size); 2351da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2361da177e4SLinus Torvalds hpfs_brelse4(&qbh); 2371da177e4SLinus Torvalds } 2381da177e4SLinus Torvalds if (S_ISDIR(i->i_mode)) { 2391da177e4SLinus Torvalds if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { 2400b69760bSMikulas Patocka de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec)); 2410b69760bSMikulas Patocka de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec)); 2420b69760bSMikulas Patocka de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec)); 2431da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2440b69760bSMikulas Patocka de->ea_size = cpu_to_le32(/*hpfs_inode->i_ea_size*/0); 2450b69760bSMikulas Patocka de->file_size = cpu_to_le32(0); 2461da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2471da177e4SLinus Torvalds hpfs_brelse4(&qbh); 24818debbbcSRandy Dunlap } else 24918debbbcSRandy Dunlap hpfs_error(i->i_sb, 25018debbbcSRandy Dunlap "directory %08lx doesn't have '.' entry", 25118debbbcSRandy Dunlap (unsigned long)i->i_ino); 2521da177e4SLinus Torvalds } 2531da177e4SLinus Torvalds mark_buffer_dirty(bh); 2541da177e4SLinus Torvalds brelse(bh); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 257ca30bc99SChristoph Hellwig int hpfs_setattr(struct dentry *dentry, struct iattr *attr) 2581da177e4SLinus Torvalds { 2591da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 260ca30bc99SChristoph Hellwig int error = -EINVAL; 261ca30bc99SChristoph Hellwig 2629a311b96SArnd Bergmann hpfs_lock(inode->i_sb); 263ca30bc99SChristoph Hellwig if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root) 264ca30bc99SChristoph Hellwig goto out_unlock; 2650e1a43c7SEric W. Biederman if ((attr->ia_valid & ATTR_UID) && 2660e1a43c7SEric W. Biederman from_kuid(&init_user_ns, attr->ia_uid) >= 0x10000) 26748f10e8cSMikulas Patocka goto out_unlock; 2680e1a43c7SEric W. Biederman if ((attr->ia_valid & ATTR_GID) && 2690e1a43c7SEric W. Biederman from_kgid(&init_user_ns, attr->ia_gid) >= 0x10000) 27048f10e8cSMikulas Patocka goto out_unlock; 271ca30bc99SChristoph Hellwig if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) 272ca30bc99SChristoph Hellwig goto out_unlock; 273ca30bc99SChristoph Hellwig 274ca30bc99SChristoph Hellwig error = inode_change_ok(inode, attr); 275ca30bc99SChristoph Hellwig if (error) 276ca30bc99SChristoph Hellwig goto out_unlock; 277ca30bc99SChristoph Hellwig 2781025774cSChristoph Hellwig if ((attr->ia_valid & ATTR_SIZE) && 2791025774cSChristoph Hellwig attr->ia_size != i_size_read(inode)) { 2801025774cSChristoph Hellwig error = vmtruncate(inode, attr->ia_size); 281ca30bc99SChristoph Hellwig if (error) 282274052efSDr. David Alan Gilbert goto out_unlock; 2831025774cSChristoph Hellwig } 2841025774cSChristoph Hellwig 2851025774cSChristoph Hellwig setattr_copy(inode, attr); 286ca30bc99SChristoph Hellwig 2871da177e4SLinus Torvalds hpfs_write_inode(inode); 288ca30bc99SChristoph Hellwig 289ca30bc99SChristoph Hellwig out_unlock: 2909a311b96SArnd Bergmann hpfs_unlock(inode->i_sb); 2911da177e4SLinus Torvalds return error; 2921da177e4SLinus Torvalds } 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds void hpfs_write_if_changed(struct inode *inode) 2951da177e4SLinus Torvalds { 2961da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); 2971da177e4SLinus Torvalds 2981da177e4SLinus Torvalds if (hpfs_inode->i_dirty) 2991da177e4SLinus Torvalds hpfs_write_inode(inode); 3001da177e4SLinus Torvalds } 3011da177e4SLinus Torvalds 302ea544009SAl Viro void hpfs_evict_inode(struct inode *inode) 3031da177e4SLinus Torvalds { 304fef26658SMark Fasheh truncate_inode_pages(&inode->i_data, 0); 305dbd5768fSJan Kara clear_inode(inode); 306ea544009SAl Viro if (!inode->i_nlink) { 3079a311b96SArnd Bergmann hpfs_lock(inode->i_sb); 3081da177e4SLinus Torvalds hpfs_remove_fnode(inode->i_sb, inode->i_ino); 3099a311b96SArnd Bergmann hpfs_unlock(inode->i_sb); 310ea544009SAl Viro } 3111da177e4SLinus Torvalds } 312