| /* |
| * linux/fs/hpfs/inode.c |
| * |
| * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| * |
| * inode VFS functions |
| */ |
| |
| #include <linux/time.h> |
| #include <linux/smp_lock.h> |
| #include "hpfs_fn.h" |
| |
| static struct file_operations hpfs_file_ops = |
| { |
| llseek: generic_file_llseek, |
| read: generic_file_read, |
| write: hpfs_file_write, |
| mmap: generic_file_mmap, |
| open: hpfs_open, |
| release: hpfs_file_release, |
| fsync: hpfs_file_fsync, |
| }; |
| |
| static struct inode_operations hpfs_file_iops = |
| { |
| truncate: hpfs_truncate, |
| setattr: hpfs_notify_change, |
| }; |
| |
| static struct file_operations hpfs_dir_ops = |
| { |
| llseek: hpfs_dir_lseek, |
| read: generic_read_dir, |
| readdir: hpfs_readdir, |
| open: hpfs_open, |
| release: hpfs_dir_release, |
| fsync: hpfs_file_fsync, |
| }; |
| |
| static struct inode_operations hpfs_dir_iops = |
| { |
| create: hpfs_create, |
| lookup: hpfs_lookup, |
| unlink: hpfs_unlink, |
| symlink: hpfs_symlink, |
| mkdir: hpfs_mkdir, |
| rmdir: hpfs_rmdir, |
| mknod: hpfs_mknod, |
| rename: hpfs_rename, |
| setattr: hpfs_notify_change, |
| }; |
| |
| struct address_space_operations hpfs_symlink_aops = { |
| readpage: hpfs_symlink_readpage |
| }; |
| |
| void hpfs_read_inode(struct inode *i) |
| { |
| struct buffer_head *bh; |
| struct fnode *fnode; |
| struct super_block *sb = i->i_sb; |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| unsigned char *ea; |
| int ea_size; |
| |
| i->i_uid = sb->s_hpfs_uid; |
| i->i_gid = sb->s_hpfs_gid; |
| i->i_mode = sb->s_hpfs_mode; |
| hpfs_inode->i_conv = sb->s_hpfs_conv; |
| i->i_blksize = 512; |
| i->i_size = -1; |
| i->i_blocks = -1; |
| |
| hpfs_inode->i_dno = 0; |
| hpfs_inode->i_n_secs = 0; |
| hpfs_inode->i_file_sec = 0; |
| hpfs_inode->i_disk_sec = 0; |
| hpfs_inode->i_dpos = 0; |
| hpfs_inode->i_dsubdno = 0; |
| hpfs_inode->i_ea_mode = 0; |
| hpfs_inode->i_ea_uid = 0; |
| hpfs_inode->i_ea_gid = 0; |
| hpfs_inode->i_ea_size = 0; |
| i->i_version = ++event; |
| |
| hpfs_inode->i_rddir_off = NULL; |
| hpfs_inode->i_dirty = 0; |
| |
| i->i_atime = 0; |
| i->i_mtime = 0; |
| i->i_ctime = 0; |
| |
| if (!i->i_sb->s_hpfs_rd_inode) |
| hpfs_error(i->i_sb, "read_inode: s_hpfs_rd_inode == 0"); |
| if (i->i_sb->s_hpfs_rd_inode == 2) { |
| i->i_mode |= S_IFREG; |
| i->i_mode &= ~0111; |
| i->i_op = &hpfs_file_iops; |
| i->i_fop = &hpfs_file_ops; |
| i->i_nlink = 1; |
| return; |
| } |
| if (!(fnode = hpfs_map_fnode(sb, i->i_ino, &bh))) { |
| /*i->i_mode |= S_IFREG; |
| i->i_mode &= ~0111; |
| i->i_op = &hpfs_file_iops; |
| i->i_fop = &hpfs_file_ops; |
| i->i_nlink = 0;*/ |
| make_bad_inode(i); |
| return; |
| } |
| if (i->i_sb->s_hpfs_eas) { |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { |
| if (ea_size == 2) { |
| i->i_uid = ea[0] + (ea[1] << 8); |
| hpfs_inode->i_ea_uid = 1; |
| } |
| kfree(ea); |
| } |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "GID", &ea_size))) { |
| if (ea_size == 2) { |
| i->i_gid = ea[0] + (ea[1] << 8); |
| hpfs_inode->i_ea_gid = 1; |
| } |
| kfree(ea); |
| } |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "SYMLINK", &ea_size))) { |
| kfree(ea); |
| i->i_mode = S_IFLNK | 0777; |
| i->i_op = &page_symlink_inode_operations; |
| i->i_data.a_ops = &hpfs_symlink_aops; |
| i->i_nlink = 1; |
| i->i_size = ea_size; |
| i->i_blocks = 1; |
| brelse(bh); |
| return; |
| } |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "MODE", &ea_size))) { |
| int rdev = 0; |
| umode_t mode = sb->s_hpfs_mode; |
| if (ea_size == 2) { |
| mode = ea[0] + (ea[1] << 8); |
| hpfs_inode->i_ea_mode = 1; |
| } |
| kfree(ea); |
| i->i_mode = mode; |
| if (S_ISBLK(mode) || S_ISCHR(mode)) { |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "DEV", &ea_size))) { |
| if (ea_size == 4) |
| rdev = ea[0] + (ea[1] << 8) + (ea[2] << 16) + (ea[3] << 24); |
| kfree(ea); |
| } |
| } |
| if (S_ISBLK(mode) || S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { |
| brelse(bh); |
| i->i_nlink = 1; |
| i->i_size = 0; |
| i->i_blocks = 1; |
| init_special_inode(i, mode, rdev); |
| return; |
| } |
| } |
| } |
| if (fnode->dirflag) { |
| unsigned n_dnodes, n_subdirs; |
| i->i_mode |= S_IFDIR; |
| i->i_op = &hpfs_dir_iops; |
| i->i_fop = &hpfs_dir_ops; |
| hpfs_inode->i_parent_dir = fnode->up; |
| hpfs_inode->i_dno = fnode->u.external[0].disk_secno; |
| if (sb->s_hpfs_chk >= 2) { |
| struct buffer_head *bh0; |
| if (hpfs_map_fnode(sb, hpfs_inode->i_parent_dir, &bh0)) brelse(bh0); |
| } |
| n_dnodes = 0; n_subdirs = 0; |
| hpfs_count_dnodes(i->i_sb, hpfs_inode->i_dno, &n_dnodes, &n_subdirs, NULL); |
| i->i_blocks = 4 * n_dnodes; |
| i->i_size = 2048 * n_dnodes; |
| i->i_nlink = 2 + n_subdirs; |
| } else { |
| i->i_mode |= S_IFREG; |
| if (!hpfs_inode->i_ea_mode) i->i_mode &= ~0111; |
| i->i_op = &hpfs_file_iops; |
| i->i_fop = &hpfs_file_ops; |
| i->i_nlink = 1; |
| i->i_size = fnode->file_size; |
| i->i_blocks = ((i->i_size + 511) >> 9) + 1; |
| i->i_data.a_ops = &hpfs_aops; |
| hpfs_i(i)->mmu_private = i->i_size; |
| } |
| brelse(bh); |
| } |
| |
| void hpfs_write_inode_ea(struct inode *i, struct fnode *fnode) |
| { |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| if (fnode->acl_size_l || fnode->acl_size_s) { |
| /* Some unknown structures like ACL may be in fnode, |
| we'd better not overwrite them */ |
| hpfs_error(i->i_sb, "fnode %08x has some unknown HPFS386 stuctures", i->i_ino); |
| } else if (i->i_sb->s_hpfs_eas >= 2) { |
| unsigned char ea[4]; |
| if ((i->i_uid != i->i_sb->s_hpfs_uid) || hpfs_inode->i_ea_uid) { |
| ea[0] = i->i_uid & 0xff; |
| ea[1] = i->i_uid >> 8; |
| hpfs_set_ea(i, fnode, "UID", ea, 2); |
| hpfs_inode->i_ea_uid = 1; |
| } |
| if ((i->i_gid != i->i_sb->s_hpfs_gid) || hpfs_inode->i_ea_gid) { |
| ea[0] = i->i_gid & 0xff; |
| ea[1] = i->i_gid >> 8; |
| hpfs_set_ea(i, fnode, "GID", ea, 2); |
| hpfs_inode->i_ea_gid = 1; |
| } |
| if (!S_ISLNK(i->i_mode)) |
| if ((i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) |
| | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) |
| && i->i_mode != ((i->i_sb->s_hpfs_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) |
| | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { |
| ea[0] = i->i_mode & 0xff; |
| ea[1] = i->i_mode >> 8; |
| hpfs_set_ea(i, fnode, "MODE", ea, 2); |
| hpfs_inode->i_ea_mode = 1; |
| } |
| if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { |
| int d = kdev_t_to_nr(i->i_rdev); |
| ea[0] = d & 0xff; |
| ea[1] = (d >> 8) & 0xff; |
| ea[2] = (d >> 16) & 0xff; |
| ea[3] = d >> 24; |
| hpfs_set_ea(i, fnode, "DEV", ea, 4); |
| } |
| } |
| } |
| |
| void hpfs_write_inode(struct inode *i) |
| { |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| struct inode *parent; |
| if (!i->i_nlink) return; |
| if (i->i_ino == i->i_sb->s_hpfs_root) return; |
| if (hpfs_inode->i_rddir_off && !atomic_read(&i->i_count)) { |
| if (*hpfs_inode->i_rddir_off) printk("HPFS: write_inode: some position still there\n"); |
| kfree(hpfs_inode->i_rddir_off); |
| hpfs_inode->i_rddir_off = NULL; |
| } |
| hpfs_inode->i_dirty = 0; |
| hpfs_lock_iget(i->i_sb, 1); |
| parent = iget(i->i_sb, hpfs_inode->i_parent_dir); |
| hpfs_unlock_iget(i->i_sb); |
| hpfs_lock_inode(parent); |
| hpfs_write_inode_nolock(i); |
| hpfs_unlock_inode(parent); |
| iput(parent); |
| } |
| |
| void hpfs_write_inode_nolock(struct inode *i) |
| { |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| struct buffer_head *bh; |
| struct fnode *fnode; |
| struct quad_buffer_head qbh; |
| struct hpfs_dirent *de; |
| if (i->i_ino == i->i_sb->s_hpfs_root) return; |
| if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; |
| if (i->i_ino != i->i_sb->s_hpfs_root) { |
| if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) { |
| brelse(bh); |
| return; |
| } |
| } else de = NULL; |
| if (S_ISREG(i->i_mode)) { |
| fnode->file_size = de->file_size = i->i_size; |
| } else if (S_ISDIR(i->i_mode)) { |
| fnode->file_size = de->file_size = 0; |
| } |
| hpfs_write_inode_ea(i, fnode); |
| if (de) { |
| de->write_date = gmt_to_local(i->i_sb, i->i_mtime); |
| de->read_date = gmt_to_local(i->i_sb, i->i_atime); |
| de->creation_date = gmt_to_local(i->i_sb, i->i_ctime); |
| de->read_only = !(i->i_mode & 0222); |
| de->ea_size = hpfs_inode->i_ea_size; |
| hpfs_mark_4buffers_dirty(&qbh); |
| hpfs_brelse4(&qbh); |
| } |
| if (S_ISDIR(i->i_mode)) { |
| if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) { |
| de->write_date = gmt_to_local(i->i_sb, i->i_mtime); |
| de->read_date = gmt_to_local(i->i_sb, i->i_atime); |
| de->creation_date = gmt_to_local(i->i_sb, i->i_ctime); |
| de->read_only = !(i->i_mode & 0222); |
| de->ea_size = /*hpfs_inode->i_ea_size*/0; |
| de->file_size = 0; |
| hpfs_mark_4buffers_dirty(&qbh); |
| hpfs_brelse4(&qbh); |
| } else hpfs_error(i->i_sb, "directory %08x doesn't have '.' entry", i->i_ino); |
| } |
| mark_buffer_dirty(bh); |
| brelse(bh); |
| } |
| |
| int hpfs_notify_change(struct dentry *dentry, struct iattr *attr) |
| { |
| struct inode *inode = dentry->d_inode; |
| int error; |
| if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) |
| return -EINVAL; |
| if (inode->i_sb->s_hpfs_root == inode->i_ino) return -EINVAL; |
| if ((error = inode_change_ok(inode, attr))) return error; |
| error = inode_setattr(inode, attr); |
| if (error) return error; |
| hpfs_write_inode(inode); |
| return 0; |
| } |
| |
| void hpfs_write_if_changed(struct inode *inode) |
| { |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(inode); |
| |
| if (hpfs_inode->i_dirty) |
| hpfs_write_inode(inode); |
| } |
| |
| void hpfs_delete_inode(struct inode *inode) |
| { |
| lock_kernel(); |
| hpfs_remove_fnode(inode->i_sb, inode->i_ino); |
| unlock_kernel(); |
| clear_inode(inode); |
| } |