Lines Matching refs:sb
26 static unsigned ext4_num_base_meta_clusters(struct super_block *sb,
35 ext4_group_t ext4_get_group_number(struct super_block *sb,
40 if (test_opt2(sb, STD_GROUP_SIZE))
42 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) >>
43 (EXT4_BLOCK_SIZE_BITS(sb) + EXT4_CLUSTER_BITS(sb) + 3);
45 ext4_get_group_no_and_offset(sb, block, &group, NULL);
53 void ext4_get_group_no_and_offset(struct super_block *sb, ext4_fsblk_t blocknr,
56 struct ext4_super_block *es = EXT4_SB(sb)->s_es;
60 offset = do_div(blocknr, EXT4_BLOCKS_PER_GROUP(sb)) >>
61 EXT4_SB(sb)->s_cluster_bits;
73 static inline int ext4_block_in_group(struct super_block *sb,
79 actual_group = ext4_get_group_number(sb, block);
87 static unsigned ext4_num_overhead_clusters(struct super_block *sb,
94 ext4_fsblk_t start = ext4_group_first_block_no(sb, block_group);
95 ext4_fsblk_t end = start + EXT4_BLOCKS_PER_GROUP(sb) - 1;
97 struct ext4_sb_info *sbi = EXT4_SB(sb);
102 base_clusters = ext4_num_base_meta_clusters(sb, block_group);
111 itbl_blk_start = ext4_inode_table(sb, gdp);
137 if (ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp), block_group)) {
139 ext4_block_bitmap(sb, gdp) - start);
146 if (ext4_block_in_group(sb, ext4_inode_bitmap(sb, gdp), block_group)) {
148 ext4_inode_bitmap(sb, gdp) - start);
163 static unsigned int num_clusters_in_group(struct super_block *sb,
168 if (block_group == ext4_get_groups_count(sb) - 1) {
175 blocks = ext4_blocks_count(EXT4_SB(sb)->s_es) -
176 ext4_group_first_block_no(sb, block_group);
178 blocks = EXT4_BLOCKS_PER_GROUP(sb);
179 return EXT4_NUM_B2C(EXT4_SB(sb), blocks);
183 static int ext4_init_block_bitmap(struct super_block *sb,
189 struct ext4_sb_info *sbi = EXT4_SB(sb);
194 if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
195 ext4_mark_group_bitmap_corrupted(sb, block_group,
200 memset(bh->b_data, 0, sb->s_blocksize);
202 bit_max = ext4_num_base_meta_clusters(sb, block_group);
209 start = ext4_group_first_block_no(sb, block_group);
212 tmp = ext4_block_bitmap(sb, gdp);
213 if (ext4_block_in_group(sb, tmp, block_group))
216 tmp = ext4_inode_bitmap(sb, gdp);
217 if (ext4_block_in_group(sb, tmp, block_group))
220 tmp = ext4_inode_table(sb, gdp);
221 for (; tmp < ext4_inode_table(sb, gdp) +
223 if (ext4_block_in_group(sb, tmp, block_group))
232 ext4_mark_bitmap_end(num_clusters_in_group(sb, block_group),
233 sb->s_blocksize * 8, bh->b_data);
240 unsigned ext4_free_clusters_after_init(struct super_block *sb,
244 return num_clusters_in_group(sb, block_group) -
245 ext4_num_overhead_clusters(sb, block_group, gdp);
261 * @sb: super block
266 struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
272 ext4_group_t ngroups = ext4_get_groups_count(sb);
274 struct ext4_sb_info *sbi = EXT4_SB(sb);
278 ext4_error(sb, "block_group >= groups_count - block_group = %u,"
284 group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
285 offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
294 ext4_error(sb, "Group descriptor not loaded - "
302 offset * EXT4_DESC_SIZE(sb));
308 static ext4_fsblk_t ext4_valid_block_bitmap_padding(struct super_block *sb,
313 unsigned long bitmap_size = sb->s_blocksize * 8;
314 unsigned int offset = num_clusters_in_group(sb, block_group);
324 struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
330 if (unlikely(group >= EXT4_SB(sb)->s_groups_count))
332 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
333 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
334 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
342 static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb,
347 struct ext4_sb_info *sbi = EXT4_SB(sb);
350 ext4_grpblk_t max_bit = EXT4_CLUSTERS_PER_GROUP(sb);
354 if (ext4_has_feature_flex_bg(sb)) {
363 group_first_block = ext4_group_first_block_no(sb, block_group);
366 blk = ext4_block_bitmap(sb, desc);
374 blk = ext4_inode_bitmap(sb, desc);
382 blk = ext4_inode_table(sb, desc);
397 static int ext4_validate_block_bitmap(struct super_block *sb,
405 if (EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY)
408 grp = ext4_get_group_info(sb, block_group);
415 ext4_lock_group(sb, block_group);
418 if (unlikely(!ext4_block_bitmap_csum_verify(sb, desc, bh) ||
419 ext4_simulate_fail(sb, EXT4_SIM_BBITMAP_CRC))) {
420 ext4_unlock_group(sb, block_group);
421 ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
422 ext4_mark_group_bitmap_corrupted(sb, block_group,
426 blk = ext4_valid_block_bitmap(sb, desc, block_group, bh);
428 ext4_unlock_group(sb, block_group);
429 ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
431 ext4_mark_group_bitmap_corrupted(sb, block_group,
435 blk = ext4_valid_block_bitmap_padding(sb, block_group, bh);
437 ext4_unlock_group(sb, block_group);
438 ext4_error(sb, "bg %u: block %llu: padding at end of block bitmap is not set",
440 ext4_mark_group_bitmap_corrupted(sb, block_group,
446 ext4_unlock_group(sb, block_group);
452 * @sb: super block
462 ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group,
466 struct ext4_sb_info *sbi = EXT4_SB(sb);
471 desc = ext4_get_group_desc(sb, block_group, NULL);
474 bitmap_blk = ext4_block_bitmap(sb, desc);
477 ext4_error(sb, "Invalid block bitmap block %llu in "
479 ext4_mark_group_bitmap_corrupted(sb, block_group,
483 bh = sb_getblk(sb, bitmap_blk);
485 ext4_warning(sb, "Cannot get buffer for block bitmap - "
505 ext4_lock_group(sb, block_group);
506 if (ext4_has_group_desc_csum(sb) &&
509 ext4_unlock_group(sb, block_group);
511 ext4_error(sb, "Block bitmap for bg 0 marked "
516 err = ext4_init_block_bitmap(sb, bh, block_group, desc);
518 ext4_unlock_group(sb, block_group);
520 ext4_error(sb, "Failed to init block bitmap for group "
527 ext4_unlock_group(sb, block_group);
531 ext4_unlock_group(sb, block_group);
545 trace_ext4_read_block_bitmap_load(sb, block_group, ignore_locked);
551 err = ext4_validate_block_bitmap(sb, desc, block_group, bh);
561 int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group,
568 desc = ext4_get_group_desc(sb, block_group, NULL);
572 ext4_simulate_fail_bh(sb, bh, EXT4_SIM_BBITMAP_EIO);
574 ext4_error_err(sb, EIO, "Cannot read block bitmap - "
577 ext4_mark_group_bitmap_corrupted(sb, block_group,
583 return ext4_validate_block_bitmap(sb, desc, block_group, bh);
587 ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
592 bh = ext4_read_block_bitmap_nowait(sb, block_group, false);
595 err = ext4_wait_block_bitmap(sb, block_group, bh);
672 * @sb: superblock
681 int ext4_should_retry_alloc(struct super_block *sb, int *retries)
683 struct ext4_sb_info *sbi = EXT4_SB(sb);
699 if (test_opt(sb, DISCARD)) {
711 ext4_debug("%s: retrying operation after ENOSPC\n", sb->s_id);
758 * @sb: superblock
762 ext4_fsblk_t ext4_count_free_clusters(struct super_block *sb)
767 ext4_group_t ngroups = ext4_get_groups_count(sb);
775 es = EXT4_SB(sb)->s_es;
781 gdp = ext4_get_group_desc(sb, i, NULL);
785 if (EXT4_SB(sb)->s_group_info)
786 grp = ext4_get_group_info(sb, i);
788 desc_count += ext4_free_group_clusters(sb, gdp);
790 bitmap_bh = ext4_read_block_bitmap(sb, i);
797 EXT4_CLUSTERS_PER_GROUP(sb) / 8);
799 i, ext4_free_group_clusters(sb, gdp), x);
805 EXT4_NUM_B2C(EXT4_SB(sb), ext4_free_blocks_count(es)),
811 gdp = ext4_get_group_desc(sb, i, NULL);
815 if (EXT4_SB(sb)->s_group_info)
816 grp = ext4_get_group_info(sb, i);
818 desc_count += ext4_free_group_clusters(sb, gdp);
840 * @sb: superblock for filesystem
846 int ext4_bg_has_super(struct super_block *sb, ext4_group_t group)
848 struct ext4_super_block *es = EXT4_SB(sb)->s_es;
852 if (ext4_has_feature_sparse_super2(sb)) {
858 if ((group <= 1) || !ext4_has_feature_sparse_super(sb))
869 static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb,
872 unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
873 ext4_group_t first = metagroup * EXT4_DESC_PER_BLOCK(sb);
874 ext4_group_t last = first + EXT4_DESC_PER_BLOCK(sb) - 1;
881 static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,
884 if (!ext4_bg_has_super(sb, group))
887 if (ext4_has_feature_meta_bg(sb))
888 return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
890 return EXT4_SB(sb)->s_gdb_count;
895 * @sb: superblock for filesystem
902 unsigned long ext4_bg_num_gdb(struct super_block *sb, ext4_group_t group)
905 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
906 unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
908 if (!ext4_has_feature_meta_bg(sb) || metagroup < first_meta_bg)
909 return ext4_bg_num_gdb_nometa(sb, group);
911 return ext4_bg_num_gdb_meta(sb,group);
919 unsigned int ext4_num_base_meta_blocks(struct super_block *sb,
922 struct ext4_sb_info *sbi = EXT4_SB(sb);
926 num = ext4_bg_has_super(sb, block_group);
928 if (!ext4_has_feature_meta_bg(sb) ||
932 num += ext4_bg_num_gdb_nometa(sb, block_group);
936 num += ext4_bg_num_gdb_meta(sb, block_group);
941 static unsigned int ext4_num_base_meta_clusters(struct super_block *sb,
944 return EXT4_NUM_B2C(EXT4_SB(sb), ext4_num_base_meta_blocks(sb, block_group));