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 9405f5571SAlexey Dobriyan #include <linux/smp_lock.h> 105a0e3ad6STejun Heo #include <linux/slab.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 hpfs_inode->i_conv = hpfs_sb(sb)->sb_conv; 221da177e4SLinus Torvalds i->i_size = -1; 231da177e4SLinus Torvalds i->i_blocks = -1; 241da177e4SLinus Torvalds 251da177e4SLinus Torvalds hpfs_inode->i_dno = 0; 261da177e4SLinus Torvalds hpfs_inode->i_n_secs = 0; 271da177e4SLinus Torvalds hpfs_inode->i_file_sec = 0; 281da177e4SLinus Torvalds hpfs_inode->i_disk_sec = 0; 291da177e4SLinus Torvalds hpfs_inode->i_dpos = 0; 301da177e4SLinus Torvalds hpfs_inode->i_dsubdno = 0; 311da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 0; 321da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 0; 331da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 0; 341da177e4SLinus Torvalds hpfs_inode->i_ea_size = 0; 351da177e4SLinus Torvalds 361da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 371da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 381da177e4SLinus Torvalds 391da177e4SLinus Torvalds i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; 401da177e4SLinus Torvalds i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; 411da177e4SLinus Torvalds i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; 421da177e4SLinus Torvalds } 431da177e4SLinus Torvalds 441da177e4SLinus Torvalds void hpfs_read_inode(struct inode *i) 451da177e4SLinus Torvalds { 461da177e4SLinus Torvalds struct buffer_head *bh; 471da177e4SLinus Torvalds struct fnode *fnode; 481da177e4SLinus Torvalds struct super_block *sb = i->i_sb; 491da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 507e7742eeSAl Viro void *ea; 511da177e4SLinus Torvalds int ea_size; 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { 541da177e4SLinus Torvalds /*i->i_mode |= S_IFREG; 551da177e4SLinus Torvalds i->i_mode &= ~0111; 561da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 571da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 581da177e4SLinus Torvalds i->i_nlink = 0;*/ 591da177e4SLinus Torvalds make_bad_inode(i); 601da177e4SLinus Torvalds return; 611da177e4SLinus Torvalds } 621da177e4SLinus Torvalds if (hpfs_sb(i->i_sb)->sb_eas) { 631da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { 641da177e4SLinus Torvalds if (ea_size == 2) { 652ef10312SAl Viro i->i_uid = le16_to_cpu(*(__le16*)ea); 661da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 671da177e4SLinus Torvalds } 681da177e4SLinus Torvalds kfree(ea); 691da177e4SLinus Torvalds } 701da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { 711da177e4SLinus Torvalds if (ea_size == 2) { 722ef10312SAl Viro i->i_gid = le16_to_cpu(*(__le16*)ea); 731da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 741da177e4SLinus Torvalds } 751da177e4SLinus Torvalds kfree(ea); 761da177e4SLinus Torvalds } 771da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { 781da177e4SLinus Torvalds kfree(ea); 791da177e4SLinus Torvalds i->i_mode = S_IFLNK | 0777; 801da177e4SLinus Torvalds i->i_op = &page_symlink_inode_operations; 811da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_symlink_aops; 821da177e4SLinus Torvalds i->i_nlink = 1; 831da177e4SLinus Torvalds i->i_size = ea_size; 841da177e4SLinus Torvalds i->i_blocks = 1; 851da177e4SLinus Torvalds brelse(bh); 861da177e4SLinus Torvalds return; 871da177e4SLinus Torvalds } 881da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { 891da177e4SLinus Torvalds int rdev = 0; 901da177e4SLinus Torvalds umode_t mode = hpfs_sb(sb)->sb_mode; 911da177e4SLinus Torvalds if (ea_size == 2) { 922ef10312SAl Viro mode = le16_to_cpu(*(__le16*)ea); 931da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 941da177e4SLinus Torvalds } 951da177e4SLinus Torvalds kfree(ea); 961da177e4SLinus Torvalds i->i_mode = mode; 971da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode)) { 981da177e4SLinus Torvalds if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { 991da177e4SLinus Torvalds if (ea_size == 4) 1002ef10312SAl Viro rdev = le32_to_cpu(*(__le32*)ea); 1011da177e4SLinus Torvalds kfree(ea); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 1051da177e4SLinus Torvalds brelse(bh); 1061da177e4SLinus Torvalds i->i_nlink = 1; 1071da177e4SLinus Torvalds i->i_size = 0; 1081da177e4SLinus Torvalds i->i_blocks = 1; 1091da177e4SLinus Torvalds init_special_inode(i, mode, 1101da177e4SLinus Torvalds new_decode_dev(rdev)); 1111da177e4SLinus Torvalds return; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds if (fnode->dirflag) { 1167e7742eeSAl Viro int n_dnodes, n_subdirs; 1171da177e4SLinus Torvalds i->i_mode |= S_IFDIR; 1181da177e4SLinus Torvalds i->i_op = &hpfs_dir_iops; 1191da177e4SLinus Torvalds i->i_fop = &hpfs_dir_ops; 1201da177e4SLinus Torvalds hpfs_inode->i_parent_dir = fnode->up; 1211da177e4SLinus Torvalds hpfs_inode->i_dno = fnode->u.external[0].disk_secno; 1221da177e4SLinus Torvalds if (hpfs_sb(sb)->sb_chk >= 2) { 1231da177e4SLinus Torvalds struct buffer_head *bh0; 1241da177e4SLinus Torvalds if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds n_dnodes = 0; n_subdirs = 0; 1271da177e4SLinus Torvalds hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); 1281da177e4SLinus Torvalds i->i_blocks = 4 * n_dnodes; 1291da177e4SLinus Torvalds i->i_size = 2048 * n_dnodes; 1301da177e4SLinus Torvalds i->i_nlink = 2 + n_subdirs; 1311da177e4SLinus Torvalds } else { 1321da177e4SLinus Torvalds i->i_mode |= S_IFREG; 1331da177e4SLinus Torvalds if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; 1341da177e4SLinus Torvalds i->i_op = &hpfs_file_iops; 1351da177e4SLinus Torvalds i->i_fop = &hpfs_file_ops; 1361da177e4SLinus Torvalds i->i_nlink = 1; 1371da177e4SLinus Torvalds i->i_size = fnode->file_size; 1381da177e4SLinus Torvalds i->i_blocks = ((i->i_size + 511) >> 9) + 1; 1391da177e4SLinus Torvalds i->i_data.a_ops = &hpfs_aops; 1401da177e4SLinus Torvalds hpfs_i(i)->mmu_private = i->i_size; 1411da177e4SLinus Torvalds } 1421da177e4SLinus Torvalds brelse(bh); 1431da177e4SLinus Torvalds } 1441da177e4SLinus Torvalds 1451da177e4SLinus Torvalds static void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) 1461da177e4SLinus Torvalds { 1471da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1481da177e4SLinus Torvalds /*if (fnode->acl_size_l || fnode->acl_size_s) { 1491da177e4SLinus Torvalds Some unknown structures like ACL may be in fnode, 1501da177e4SLinus Torvalds we'd better not overwrite them 1511da177e4SLinus Torvalds hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino); 1521da177e4SLinus Torvalds } else*/ if (hpfs_sb(i->i_sb)->sb_eas >= 2) { 1532ef10312SAl Viro __le32 ea; 1541da177e4SLinus Torvalds if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { 1551da177e4SLinus Torvalds ea = cpu_to_le32(i->i_uid); 1561da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); 1571da177e4SLinus Torvalds hpfs_inode->i_ea_uid = 1; 1581da177e4SLinus Torvalds } 1591da177e4SLinus Torvalds if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { 1601da177e4SLinus Torvalds ea = cpu_to_le32(i->i_gid); 1611da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); 1621da177e4SLinus Torvalds hpfs_inode->i_ea_gid = 1; 1631da177e4SLinus Torvalds } 1641da177e4SLinus Torvalds if (!S_ISLNK(i->i_mode)) 1651da177e4SLinus Torvalds if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) 1661da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) 1671da177e4SLinus Torvalds && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) 1681da177e4SLinus Torvalds | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { 1691da177e4SLinus Torvalds ea = cpu_to_le32(i->i_mode); 1702ef10312SAl Viro /* sick, but legal */ 1711da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); 1721da177e4SLinus Torvalds hpfs_inode->i_ea_mode = 1; 1731da177e4SLinus Torvalds } 1741da177e4SLinus Torvalds if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { 1751da177e4SLinus Torvalds ea = cpu_to_le32(new_encode_dev(i->i_rdev)); 1761da177e4SLinus Torvalds hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); 1771da177e4SLinus Torvalds } 1781da177e4SLinus Torvalds } 1791da177e4SLinus Torvalds } 1801da177e4SLinus Torvalds 1811da177e4SLinus Torvalds void hpfs_write_inode(struct inode *i) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 1841da177e4SLinus Torvalds struct inode *parent; 1851da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 1861da177e4SLinus Torvalds if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { 1871da177e4SLinus Torvalds if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); 1881da177e4SLinus Torvalds kfree(hpfs_inode->i_rddir_off); 1891da177e4SLinus Torvalds hpfs_inode->i_rddir_off = NULL; 1901da177e4SLinus Torvalds } 1917bf6d78dSIngo Molnar mutex_lock(&hpfs_inode->i_parent_mutex); 1921da177e4SLinus Torvalds if (!i->i_nlink) { 1937bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_parent_mutex); 1941da177e4SLinus Torvalds return; 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); 1971da177e4SLinus Torvalds if (parent) { 1981da177e4SLinus Torvalds hpfs_inode->i_dirty = 0; 1991da177e4SLinus Torvalds if (parent->i_state & I_NEW) { 2001da177e4SLinus Torvalds hpfs_init_inode(parent); 2011da177e4SLinus Torvalds hpfs_read_inode(parent); 2021da177e4SLinus Torvalds unlock_new_inode(parent); 2031da177e4SLinus Torvalds } 2047bf6d78dSIngo Molnar mutex_lock(&hpfs_inode->i_mutex); 2051da177e4SLinus Torvalds hpfs_write_inode_nolock(i); 2067bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_mutex); 2071da177e4SLinus Torvalds iput(parent); 2081da177e4SLinus Torvalds } else { 2091da177e4SLinus Torvalds mark_inode_dirty(i); 2101da177e4SLinus Torvalds } 2117bf6d78dSIngo Molnar mutex_unlock(&hpfs_inode->i_parent_mutex); 2121da177e4SLinus Torvalds } 2131da177e4SLinus Torvalds 2141da177e4SLinus Torvalds void hpfs_write_inode_nolock(struct inode *i) 2151da177e4SLinus Torvalds { 2161da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(i); 2171da177e4SLinus Torvalds struct buffer_head *bh; 2181da177e4SLinus Torvalds struct fnode *fnode; 2191da177e4SLinus Torvalds struct quad_buffer_head qbh; 2201da177e4SLinus Torvalds struct hpfs_dirent *de; 2211da177e4SLinus Torvalds if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return; 2221da177e4SLinus Torvalds if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; 2231da177e4SLinus Torvalds if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { 2241da177e4SLinus Torvalds if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { 2251da177e4SLinus Torvalds brelse(bh); 2261da177e4SLinus Torvalds return; 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds } else de = NULL; 2291da177e4SLinus Torvalds if (S_ISREG(i->i_mode)) { 2301da177e4SLinus Torvalds fnode->file_size = i->i_size; 2311da177e4SLinus Torvalds if (de) de->file_size = i->i_size; 2321da177e4SLinus Torvalds } else if (S_ISDIR(i->i_mode)) { 2331da177e4SLinus Torvalds fnode->file_size = 0; 2341da177e4SLinus Torvalds if (de) de->file_size = 0; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds hpfs_write_inode_ea(i, fnode); 2371da177e4SLinus Torvalds if (de) { 2381da177e4SLinus Torvalds de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 2391da177e4SLinus Torvalds de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 2401da177e4SLinus Torvalds de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 2411da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2421da177e4SLinus Torvalds de->ea_size = hpfs_inode->i_ea_size; 2431da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2441da177e4SLinus Torvalds hpfs_brelse4(&qbh); 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds if (S_ISDIR(i->i_mode)) { 2471da177e4SLinus Torvalds if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { 2481da177e4SLinus Torvalds de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); 2491da177e4SLinus Torvalds de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); 2501da177e4SLinus Torvalds de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); 2511da177e4SLinus Torvalds de->read_only = !(i->i_mode & 0222); 2521da177e4SLinus Torvalds de->ea_size = /*hpfs_inode->i_ea_size*/0; 2531da177e4SLinus Torvalds de->file_size = 0; 2541da177e4SLinus Torvalds hpfs_mark_4buffers_dirty(&qbh); 2551da177e4SLinus Torvalds hpfs_brelse4(&qbh); 25618debbbcSRandy Dunlap } else 25718debbbcSRandy Dunlap hpfs_error(i->i_sb, 25818debbbcSRandy Dunlap "directory %08lx doesn't have '.' entry", 25918debbbcSRandy Dunlap (unsigned long)i->i_ino); 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds mark_buffer_dirty(bh); 2621da177e4SLinus Torvalds brelse(bh); 2631da177e4SLinus Torvalds } 2641da177e4SLinus Torvalds 265ca30bc99SChristoph Hellwig int hpfs_setattr(struct dentry *dentry, struct iattr *attr) 2661da177e4SLinus Torvalds { 2671da177e4SLinus Torvalds struct inode *inode = dentry->d_inode; 268ca30bc99SChristoph Hellwig int error = -EINVAL; 269ca30bc99SChristoph Hellwig 2701da177e4SLinus Torvalds lock_kernel(); 271ca30bc99SChristoph Hellwig if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root) 272ca30bc99SChristoph Hellwig goto out_unlock; 273ca30bc99SChristoph Hellwig if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) 274ca30bc99SChristoph Hellwig goto out_unlock; 275ca30bc99SChristoph Hellwig 276ca30bc99SChristoph Hellwig error = inode_change_ok(inode, attr); 277ca30bc99SChristoph Hellwig if (error) 278ca30bc99SChristoph Hellwig goto out_unlock; 279ca30bc99SChristoph Hellwig 2801025774cSChristoph Hellwig if ((attr->ia_valid & ATTR_SIZE) && 2811025774cSChristoph Hellwig attr->ia_size != i_size_read(inode)) { 2821025774cSChristoph Hellwig error = vmtruncate(inode, attr->ia_size); 283ca30bc99SChristoph Hellwig if (error) 2841025774cSChristoph Hellwig return error; 2851025774cSChristoph Hellwig } 2861025774cSChristoph Hellwig 2871025774cSChristoph Hellwig setattr_copy(inode, attr); 2881025774cSChristoph Hellwig mark_inode_dirty(inode); 289ca30bc99SChristoph Hellwig 2901da177e4SLinus Torvalds hpfs_write_inode(inode); 291ca30bc99SChristoph Hellwig 292ca30bc99SChristoph Hellwig out_unlock: 2931da177e4SLinus Torvalds unlock_kernel(); 2941da177e4SLinus Torvalds return error; 2951da177e4SLinus Torvalds } 2961da177e4SLinus Torvalds 2971da177e4SLinus Torvalds void hpfs_write_if_changed(struct inode *inode) 2981da177e4SLinus Torvalds { 2991da177e4SLinus Torvalds struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if (hpfs_inode->i_dirty) 3021da177e4SLinus Torvalds hpfs_write_inode(inode); 3031da177e4SLinus Torvalds } 3041da177e4SLinus Torvalds 3051da177e4SLinus Torvalds void hpfs_delete_inode(struct inode *inode) 3061da177e4SLinus Torvalds { 307fef26658SMark Fasheh truncate_inode_pages(&inode->i_data, 0); 3081da177e4SLinus Torvalds lock_kernel(); 3091da177e4SLinus Torvalds hpfs_remove_fnode(inode->i_sb, inode->i_ino); 3101da177e4SLinus Torvalds unlock_kernel(); 3111da177e4SLinus Torvalds clear_inode(inode); 3121da177e4SLinus Torvalds } 313