/* * linux/fs/hpfs/inode.c * * Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999 * * inode VFS functions */ #include <linux/smp_lock.h> #include <linux/slab.h> #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_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); void *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(*(__le16*)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(*(__le16*)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(*(__le16*)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(*(__le32*)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) { int 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) { __le32 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); /* sick, but legal */ 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 %08lx doesn't have '.' entry", (unsigned long)i->i_ino); } mark_buffer_dirty(bh); brelse(bh); } int hpfs_setattr(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; int error = -EINVAL; lock_kernel(); if (inode->i_ino == hpfs_sb(inode->i_sb)->sb_root) goto out_unlock; if ((attr->ia_valid & ATTR_SIZE) && attr->ia_size > inode->i_size) goto out_unlock; error = inode_change_ok(inode, attr); if (error) goto out_unlock; error = inode_setattr(inode, attr); if (error) goto out_unlock; hpfs_write_inode(inode); out_unlock: 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); }