add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/hfsplus/inode.c
..
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@@ -187,11 +187,11 @@
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 	mode = be16_to_cpu(perms->mode);
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 	i_uid_write(inode, be32_to_cpu(perms->owner));
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-	if (!i_uid_read(inode) && !mode)
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+	if ((test_bit(HFSPLUS_SB_UID, &sbi->flags)) || (!i_uid_read(inode) && !mode))
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 		inode->i_uid = sbi->uid;
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 	i_gid_write(inode, be32_to_cpu(perms->group));
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-	if (!i_gid_read(inode) && !mode)
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+	if ((test_bit(HFSPLUS_SB_GID, &sbi->flags)) || (!i_gid_read(inode) && !mode))
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 		inode->i_gid = sbi->gid;
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 	if (dir) {
..
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@@ -270,6 +270,26 @@
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 	return 0;
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 }
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+int hfsplus_getattr(const struct path *path, struct kstat *stat,
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+		    u32 request_mask, unsigned int query_flags)
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+{
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+	struct inode *inode = d_inode(path->dentry);
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+	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
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+
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+	if (inode->i_flags & S_APPEND)
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+		stat->attributes |= STATX_ATTR_APPEND;
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+	if (inode->i_flags & S_IMMUTABLE)
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+		stat->attributes |= STATX_ATTR_IMMUTABLE;
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+	if (hip->userflags & HFSPLUS_FLG_NODUMP)
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+		stat->attributes |= STATX_ATTR_NODUMP;
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+
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+	stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE |
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+				 STATX_ATTR_NODUMP;
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+
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+	generic_fillattr(inode, stat);
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+	return 0;
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+}
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+
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 int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
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 		       int datasync)
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 {
..
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@@ -320,7 +340,7 @@
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 	}
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 	if (!test_bit(HFSPLUS_SB_NOBARRIER, &sbi->flags))
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-		blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
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+		blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL);
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 	inode_unlock(inode);
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..
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@@ -329,6 +349,7 @@
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 static const struct inode_operations hfsplus_file_inode_operations = {
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 	.setattr	= hfsplus_setattr,
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+	.getattr	= hfsplus_getattr,
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 	.listxattr	= hfsplus_listxattr,
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 };
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..
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@@ -476,16 +497,19 @@
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 	if (type == HFSPLUS_FOLDER) {
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 		struct hfsplus_cat_folder *folder = &entry.folder;
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-		if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
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-			/* panic? */;
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+		if (fd->entrylength < sizeof(struct hfsplus_cat_folder)) {
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+			pr_err("bad catalog folder entry\n");
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+			res = -EIO;
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+			goto out;
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+		}
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 		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
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 					sizeof(struct hfsplus_cat_folder));
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 		hfsplus_get_perms(inode, &folder->permissions, 1);
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 		set_nlink(inode, 1);
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 		inode->i_size = 2 + be32_to_cpu(folder->valence);
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-		inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(folder->access_date));
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-		inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(folder->content_mod_date));
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-		inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(folder->attribute_mod_date));
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+		inode->i_atime = hfsp_mt2ut(folder->access_date);
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+		inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
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+		inode->i_ctime = hfsp_mt2ut(folder->attribute_mod_date);
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 		HFSPLUS_I(inode)->create_date = folder->create_date;
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 		HFSPLUS_I(inode)->fs_blocks = 0;
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 		if (folder->flags & cpu_to_be16(HFSPLUS_HAS_FOLDER_COUNT)) {
..
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@@ -497,8 +521,11 @@
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 	} else if (type == HFSPLUS_FILE) {
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 		struct hfsplus_cat_file *file = &entry.file;
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-		if (fd->entrylength < sizeof(struct hfsplus_cat_file))
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-			/* panic? */;
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+		if (fd->entrylength < sizeof(struct hfsplus_cat_file)) {
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+			pr_err("bad catalog file entry\n");
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+			res = -EIO;
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+			goto out;
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+		}
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 		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
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 					sizeof(struct hfsplus_cat_file));
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531
 
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@@ -521,14 +548,15 @@
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 			init_special_inode(inode, inode->i_mode,
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 					   be32_to_cpu(file->permissions.dev));
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 		}
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-		inode->i_atime = timespec_to_timespec64(hfsp_mt2ut(file->access_date));
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-		inode->i_mtime = timespec_to_timespec64(hfsp_mt2ut(file->content_mod_date));
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-		inode->i_ctime = timespec_to_timespec64(hfsp_mt2ut(file->attribute_mod_date));
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+		inode->i_atime = hfsp_mt2ut(file->access_date);
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+		inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
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+		inode->i_ctime = hfsp_mt2ut(file->attribute_mod_date);
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 		HFSPLUS_I(inode)->create_date = file->create_date;
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 	} else {
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 		pr_err("bad catalog entry used to create inode\n");
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 		res = -EIO;
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 	}
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+out:
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 	return res;
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 }
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@@ -537,6 +565,7 @@
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 	struct inode *main_inode = inode;
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 	struct hfs_find_data fd;
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 	hfsplus_cat_entry entry;
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+	int res = 0;
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 	if (HFSPLUS_IS_RSRC(inode))
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 		main_inode = HFSPLUS_I(inode)->rsrc_inode;
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@@ -555,8 +584,11 @@
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 	if (S_ISDIR(main_inode->i_mode)) {
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 		struct hfsplus_cat_folder *folder = &entry.folder;
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-		if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
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-			/* panic? */;
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+		if (fd.entrylength < sizeof(struct hfsplus_cat_folder)) {
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+			pr_err("bad catalog folder entry\n");
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+			res = -EIO;
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+			goto out;
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+		}
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 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
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 					sizeof(struct hfsplus_cat_folder));
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 		/* simple node checks? */
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@@ -581,8 +613,11 @@
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 	} else {
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 		struct hfsplus_cat_file *file = &entry.file;
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-		if (fd.entrylength < sizeof(struct hfsplus_cat_file))
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-			/* panic? */;
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+		if (fd.entrylength < sizeof(struct hfsplus_cat_file)) {
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+			pr_err("bad catalog file entry\n");
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+			res = -EIO;
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+			goto out;
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+		}
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 		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
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 					sizeof(struct hfsplus_cat_file));
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 		hfsplus_inode_write_fork(inode, &file->data_fork);
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@@ -603,5 +638,5 @@
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 	set_bit(HFSPLUS_I_CAT_DIRTY, &HFSPLUS_I(inode)->flags);
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 out:
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 	hfs_find_exit(&fd);
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-	return 0;
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+	return res;
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 }