| /* |
| * linux/fs/hpfs/inode.c |
| * |
| * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 |
| * |
| * inode VFS functions |
| */ |
| |
| #include "hpfs_fn.h" |
| |
| void hpfs_init_inode(struct inode *i) |
| { |
| struct super_block *sb = i->i_sb; |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| |
| i->i_uid = hpfs_sb(sb)->sb_uid; |
| i->i_gid = hpfs_sb(sb)->sb_gid; |
| i->i_mode = hpfs_sb(sb)->sb_mode; |
| hpfs_inode->i_conv = hpfs_sb(sb)->sb_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; |
| |
| hpfs_inode->i_rddir_off = NULL; |
| hpfs_inode->i_dirty = 0; |
| |
| i->i_ctime.tv_sec = i->i_ctime.tv_nsec = 0; |
| i->i_mtime.tv_sec = i->i_mtime.tv_nsec = 0; |
| i->i_atime.tv_sec = i->i_atime.tv_nsec = 0; |
| } |
| |
| 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; |
| |
| 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 (hpfs_sb(i->i_sb)->sb_eas) { |
| if ((ea = hpfs_get_ea(i->i_sb, fnode, "UID", &ea_size))) { |
| if (ea_size == 2) { |
| i->i_uid = le16_to_cpu(*(u16*)ea); |
| 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 = le16_to_cpu(*(u16*)ea); |
| 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 = hpfs_sb(sb)->sb_mode; |
| if (ea_size == 2) { |
| mode = le16_to_cpu(*(u16*)ea); |
| 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 = le32_to_cpu(*(u32*)ea); |
| 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, |
| new_decode_dev(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 (hpfs_sb(sb)->sb_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); |
| } |
| |
| static 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 (hpfs_sb(i->i_sb)->sb_eas >= 2) { |
| u32 ea; |
| if ((i->i_uid != hpfs_sb(i->i_sb)->sb_uid) || hpfs_inode->i_ea_uid) { |
| ea = cpu_to_le32(i->i_uid); |
| hpfs_set_ea(i, fnode, "UID", (char*)&ea, 2); |
| hpfs_inode->i_ea_uid = 1; |
| } |
| if ((i->i_gid != hpfs_sb(i->i_sb)->sb_gid) || hpfs_inode->i_ea_gid) { |
| ea = cpu_to_le32(i->i_gid); |
| hpfs_set_ea(i, fnode, "GID", (char *)&ea, 2); |
| hpfs_inode->i_ea_gid = 1; |
| } |
| if (!S_ISLNK(i->i_mode)) |
| if ((i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0 : 0111)) |
| | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG)) |
| && i->i_mode != ((hpfs_sb(i->i_sb)->sb_mode & ~(S_ISDIR(i->i_mode) ? 0222 : 0333)) |
| | (S_ISDIR(i->i_mode) ? S_IFDIR : S_IFREG))) || hpfs_inode->i_ea_mode) { |
| ea = cpu_to_le32(i->i_mode); |
| hpfs_set_ea(i, fnode, "MODE", (char *)&ea, 2); |
| hpfs_inode->i_ea_mode = 1; |
| } |
| if (S_ISBLK(i->i_mode) || S_ISCHR(i->i_mode)) { |
| ea = cpu_to_le32(new_encode_dev(i->i_rdev)); |
| hpfs_set_ea(i, fnode, "DEV", (char *)&ea, 4); |
| } |
| } |
| } |
| |
| void hpfs_write_inode(struct inode *i) |
| { |
| struct hpfs_inode_info *hpfs_inode = hpfs_i(i); |
| struct inode *parent; |
| if (i->i_ino == hpfs_sb(i->i_sb)->sb_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; |
| } |
| mutex_lock(&hpfs_inode->i_parent_mutex); |
| if (!i->i_nlink) { |
| mutex_unlock(&hpfs_inode->i_parent_mutex); |
| return; |
| } |
| parent = iget_locked(i->i_sb, hpfs_inode->i_parent_dir); |
| if (parent) { |
| hpfs_inode->i_dirty = 0; |
| if (parent->i_state & I_NEW) { |
| hpfs_init_inode(parent); |
| hpfs_read_inode(parent); |
| unlock_new_inode(parent); |
| } |
| mutex_lock(&hpfs_inode->i_mutex); |
| hpfs_write_inode_nolock(i); |
| mutex_unlock(&hpfs_inode->i_mutex); |
| iput(parent); |
| } else { |
| mark_inode_dirty(i); |
| } |
| mutex_unlock(&hpfs_inode->i_parent_mutex); |
| } |
| |
| 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 == hpfs_sb(i->i_sb)->sb_root) return; |
| if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return; |
| if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) { |
| 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 = i->i_size; |
| if (de) de->file_size = i->i_size; |
| } else if (S_ISDIR(i->i_mode)) { |
| fnode->file_size = 0; |
| if (de) de->file_size = 0; |
| } |
| hpfs_write_inode_ea(i, fnode); |
| if (de) { |
| de->write_date = gmt_to_local(i->i_sb, i->i_mtime.tv_sec); |
| de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); |
| de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); |
| 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.tv_sec); |
| de->read_date = gmt_to_local(i->i_sb, i->i_atime.tv_sec); |
| de->creation_date = gmt_to_local(i->i_sb, i->i_ctime.tv_sec); |
| 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=0; |
| lock_kernel(); |
| if ( ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) || |
| (hpfs_sb(inode->i_sb)->sb_root == inode->i_ino) ) { |
| error = -EINVAL; |
| } else if ((error = inode_change_ok(inode, attr))) { |
| } else if ((error = inode_setattr(inode, attr))) { |
| } else { |
| hpfs_write_inode(inode); |
| } |
| unlock_kernel(); |
| return error; |
| } |
| |
| 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) |
| { |
| truncate_inode_pages(&inode->i_data, 0); |
| lock_kernel(); |
| hpfs_remove_fnode(inode->i_sb, inode->i_ino); |
| unlock_kernel(); |
| clear_inode(inode); |
| } |