Lines Matching refs:fs
32 STATIC __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group)
37 desc = &fs->group_desc[group];
39 if (fs->super->s_feature_ro_compat & EXT4_FEATURE_RO_COMPAT_GDT_CSUM) {
51 crc = ext2fs_crc16(~0, fs->super->s_uuid,
52 sizeof(fs->super->s_uuid));
58 if (offset < fs->super->s_desc_size) {
60 fs->super->s_desc_size - offset);
67 int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group)
69 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
71 (fs->group_desc[group].bg_checksum !=
72 ext2fs_group_desc_csum(fs, group)))
78 void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group)
80 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
82 fs->group_desc[group].bg_checksum =
83 ext2fs_group_desc_csum(fs, group);
103 errcode_t ext2fs_set_gdt_csum(ext2_filsys fs)
105 struct ext2_super_block *sb = fs->super;
106 struct ext2_group_desc *bg = fs->group_desc;
110 if (!fs->inode_map)
113 if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
117 for (i = 0; i < fs->group_desc_count; i++, bg++) {
128 find_last_inode_ingrp(fs->inode_map,
132 ext2fs_group_desc_csum_set(fs, i);
141 ext2fs_mark_super_dirty(fs);
146 void print_csum(const char *msg, ext2_filsys fs, dgrp_t group)
150 struct ext2_group_desc *desc = &fs->group_desc[group];
151 struct ext2_super_block *sb = fs->super;
154 struct ext2_group_desc swabdesc = fs->group_desc[group];
165 crc1 = ext2fs_crc16(~0, sb->s_uuid, sizeof(fs->super->s_uuid));
171 crc1, group, crc2, crc3, ext2fs_group_desc_csum(fs, group));
181 ext2_filsys fs;
188 retval = ext2fs_initialize("test fs", 0, ¶m,
189 test_io_manager, &fs);
195 memcpy(fs->super->s_uuid, sb_uuid, 16);
196 fs->super->s_feature_ro_compat = EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
198 for (i=0; i < fs->group_desc_count; i++) {
199 fs->group_desc[i].bg_block_bitmap = 124;
200 fs->group_desc[i].bg_inode_bitmap = 125;
201 fs->group_desc[i].bg_inode_table = 126;
202 fs->group_desc[i].bg_free_blocks_count = 31119;
203 fs->group_desc[i].bg_free_inodes_count = 15701;
204 fs->group_desc[i].bg_used_dirs_count = 2;
205 fs->group_desc[i].bg_flags = 0;
208 csum1 = ext2fs_group_desc_csum(fs, 0);
209 print_csum("csum0000", fs, 0);
215 csum2 = ext2fs_group_desc_csum(fs, 1);
216 print_csum("csum0001", fs, 1);
221 csum2 = ext2fs_group_desc_csum(fs, 2);
222 print_csum("csumffff", fs, 2);
227 fs->group_desc[0].bg_checksum = csum1;
228 csum2 = ext2fs_group_desc_csum(fs, 0);
229 print_csum("csum_set", fs, 0);
234 if (!ext2fs_group_desc_csum_verify(fs, 0)) {
238 memset(fs->super->s_uuid, 0x30, sizeof(fs->super->s_uuid));
239 print_csum("new_uuid", fs, 0);
240 if (ext2fs_group_desc_csum_verify(fs, 0) != 0) {
244 csum1 = fs->group_desc[0].bg_checksum = ext2fs_group_desc_csum(fs, 0);
245 print_csum("csum_new", fs, 0);
246 fs->group_desc[0].bg_free_blocks_count = 1;
247 csum2 = ext2fs_group_desc_csum(fs, 0);
248 print_csum("csum_blk", fs, 0);
