32 __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group)  in ext2fs_group_desc_csum()  argument
34 	struct ext2_group_desc *desc = ext2fs_group_desc(fs, fs->group_desc,  in ext2fs_group_desc_csum()
36 	size_t size = EXT2_DESC_SIZE(fs->super);  in ext2fs_group_desc_csum()
40 	if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {  in ext2fs_group_desc_csum()
53 		ext2fs_swap_group_desc2(fs,  in ext2fs_group_desc_csum()
59 		crc = ext2fs_crc16(~0, fs->super->s_uuid,  in ext2fs_group_desc_csum()
60 				   sizeof(fs->super->s_uuid));  in ext2fs_group_desc_csum()
85 int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group)  in ext2fs_group_desc_csum_verify()  argument
87 	if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,  in ext2fs_group_desc_csum_verify()
89 	    (ext2fs_bg_checksum(fs, group) !=  in ext2fs_group_desc_csum_verify()
90 	     ext2fs_group_desc_csum(fs, group)))  in ext2fs_group_desc_csum_verify()
96 void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group)  in ext2fs_group_desc_csum_set()  argument
98 	if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,  in ext2fs_group_desc_csum_set()
104 	ext2fs_bg_checksum_set(fs, group, ext2fs_group_desc_csum(fs, group));  in ext2fs_group_desc_csum_set()
124 errcode_t ext2fs_set_gdt_csum(ext2_filsys fs)  in ext2fs_set_gdt_csum()  argument
126 	struct ext2_super_block *sb = fs->super;  in ext2fs_set_gdt_csum()
130 	if (!fs->inode_map)  in ext2fs_set_gdt_csum()
133 	if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,  in ext2fs_set_gdt_csum()
137 	for (i = 0; i < fs->group_desc_count; i++) {  in ext2fs_set_gdt_csum()
138 		__u32 old_csum = ext2fs_bg_checksum(fs, i);  in ext2fs_set_gdt_csum()
139 		__u32 old_unused = ext2fs_bg_itable_unused(fs, i);  in ext2fs_set_gdt_csum()
140 		__u32 old_flags = ext2fs_bg_flags(fs, i);  in ext2fs_set_gdt_csum()
141 		__u32 old_free_inodes_count = ext2fs_bg_free_inodes_count(fs, i);  in ext2fs_set_gdt_csum()
144 			ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT);  in ext2fs_set_gdt_csum()
145 			ext2fs_bg_itable_unused_set(fs, i, sb->s_inodes_per_group);  in ext2fs_set_gdt_csum()
149 				find_last_inode_ingrp(fs->inode_map,  in ext2fs_set_gdt_csum()
152 			ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);  in ext2fs_set_gdt_csum()
153 			ext2fs_bg_itable_unused_set(fs, i, unused);  in ext2fs_set_gdt_csum()
156 		ext2fs_group_desc_csum_set(fs, i);  in ext2fs_set_gdt_csum()
157 		if (old_flags != ext2fs_bg_flags(fs, i))  in ext2fs_set_gdt_csum()
159 		if (old_unused != ext2fs_bg_itable_unused(fs, i))  in ext2fs_set_gdt_csum()
161 		if (old_csum != ext2fs_bg_checksum(fs, i))  in ext2fs_set_gdt_csum()
165 		ext2fs_mark_super_dirty(fs);  in ext2fs_set_gdt_csum()
172 void print_csum(const char *msg, ext2_filsys fs, dgrp_t group)  in print_csum()  argument
176 	struct ext2_group_desc *desc = ext2fs_group_desc(fs, fs->group_desc,  in print_csum()
178 	size_t size = EXT2_DESC_SIZE(fs->super);  in print_csum()
179 	struct ext2_super_block *sb = fs->super;  in print_csum()
193 	ext2fs_swap_group_desc2(fs, (struct ext2_group_desc *) &swabdesc);  in print_csum()
201 	crc1 = ext2fs_crc16(~0, sb->s_uuid, sizeof(fs->super->s_uuid));  in print_csum()
216 	       ext2fs_group_desc_csum(fs, group));  in print_csum()
226 	ext2_filsys		fs;  in main()  local
239 				   test_io_manager, &fs);  in main()
245 	memcpy(fs->super->s_uuid, sb_uuid, 16);  in main()
246 	fs->super->s_feature_ro_compat = EXT4_FEATURE_RO_COMPAT_GDT_CSUM;  in main()
248 	for (i=0; i < fs->group_desc_count; i++) {  in main()
249 		ext2fs_block_bitmap_loc_set(fs, i, 124);  in main()
250 		ext2fs_inode_bitmap_loc_set(fs, i, 125);  in main()
251 		ext2fs_inode_table_loc_set(fs, i, 126);  in main()
252 		ext2fs_bg_free_blocks_count_set(fs, i, 31119);  in main()
253 		ext2fs_bg_free_inodes_count_set(fs, i, 15701);  in main()
254 		ext2fs_bg_used_dirs_count_set(fs, i, 2);  in main()
255 		ext2fs_bg_flags_zap(fs, i);  in main()
258 	csum1 = ext2fs_group_desc_csum(fs, 0);  in main()
259 	print_csum("csum0000", fs, 0);  in main()
265 	csum2 = ext2fs_group_desc_csum(fs, 1);  in main()
266 	print_csum("csum0001", fs, 1);  in main()
271 	csum2 = ext2fs_group_desc_csum(fs, 2);  in main()
272 	print_csum("csumffff", fs, 2);  in main()
277 	ext2fs_bg_checksum_set(fs, 0, csum1);  in main()
278 	csum2 = ext2fs_group_desc_csum(fs, 0);  in main()
279 	print_csum("csum_set", fs, 0);  in main()
284 	if (!ext2fs_group_desc_csum_verify(fs, 0)) {  in main()
288 	memset(fs->super->s_uuid, 0x30, sizeof(fs->super->s_uuid));  in main()
289 	print_csum("new_uuid", fs, 0);  in main()
290 	if (ext2fs_group_desc_csum_verify(fs, 0) != 0) {  in main()
294 	csum1 = ext2fs_group_desc_csum(fs, 0);  in main()
295 	ext2fs_bg_checksum_set(fs, 0, csum1);  in main()
296 	print_csum("csum_new", fs, 0);  in main()
297 	ext2fs_bg_free_blocks_count_set(fs, 0, 1);  in main()
298 	csum2 = ext2fs_group_desc_csum(fs, 0);  in main()
299 	print_csum("csum_blk", fs, 0);  in main()