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);
86 static unsigned ext4_num_overhead_clusters(struct super_block *sb,
92 ext4_fsblk_t start = ext4_group_first_block_no(sb, block_group);
94 struct ext4_sb_info *sbi = EXT4_SB(sb);
99 num_clusters = ext4_num_base_meta_clusters(sb, block_group);
113 if (ext4_block_in_group(sb, ext4_block_bitmap(sb, gdp), block_group)) {
115 ext4_block_bitmap(sb, gdp) - start);
124 if (ext4_block_in_group(sb, ext4_inode_bitmap(sb, gdp), block_group)) {
126 ext4_inode_bitmap(sb, gdp) - start);
135 itbl_blk = ext4_inode_table(sb, gdp);
137 if (ext4_block_in_group(sb, itbl_blk + i, block_group)) {
159 static unsigned int num_clusters_in_group(struct super_block *sb,
164 if (block_group == ext4_get_groups_count(sb) - 1) {
171 blocks = ext4_blocks_count(EXT4_SB(sb)->s_es) -
172 ext4_group_first_block_no(sb, block_group);
174 blocks = EXT4_BLOCKS_PER_GROUP(sb);
175 return EXT4_NUM_B2C(EXT4_SB(sb), blocks);
179 static int ext4_init_block_bitmap(struct super_block *sb,
185 struct ext4_sb_info *sbi = EXT4_SB(sb);
192 if (!ext4_group_desc_csum_verify(sb, block_group, gdp)) {
193 ext4_mark_group_bitmap_corrupted(sb, block_group,
198 memset(bh->b_data, 0, sb->s_blocksize);
200 bit_max = ext4_num_base_meta_clusters(sb, block_group);
207 start = ext4_group_first_block_no(sb, block_group);
210 tmp = ext4_block_bitmap(sb, gdp);
211 if (ext4_block_in_group(sb, tmp, block_group))
214 tmp = ext4_inode_bitmap(sb, gdp);
215 if (ext4_block_in_group(sb, tmp, block_group))
218 tmp = ext4_inode_table(sb, gdp);
219 for (; tmp < ext4_inode_table(sb, gdp) +
221 if (ext4_block_in_group(sb, tmp, block_group))
230 ext4_mark_bitmap_end(num_clusters_in_group(sb, block_group),
231 sb->s_blocksize * 8, bh->b_data);
238 unsigned ext4_free_clusters_after_init(struct super_block *sb,
242 return num_clusters_in_group(sb, block_group) -
243 ext4_num_overhead_clusters(sb, block_group, gdp);
259 * @sb: super block
264 struct ext4_group_desc * ext4_get_group_desc(struct super_block *sb,
270 ext4_group_t ngroups = ext4_get_groups_count(sb);
272 struct ext4_sb_info *sbi = EXT4_SB(sb);
276 ext4_error(sb, "block_group >= groups_count - block_group = %u,"
282 group_desc = block_group >> EXT4_DESC_PER_BLOCK_BITS(sb);
283 offset = block_group & (EXT4_DESC_PER_BLOCK(sb) - 1);
292 ext4_error(sb, "Group descriptor not loaded - "
300 offset * EXT4_DESC_SIZE(sb));
306 static ext4_fsblk_t ext4_valid_block_bitmap_padding(struct super_block *sb,
311 unsigned long bitmap_size = sb->s_blocksize * 8;
312 unsigned int offset = num_clusters_in_group(sb, block_group);
322 struct ext4_group_info *ext4_get_group_info(struct super_block *sb,
328 if (unlikely(group >= EXT4_SB(sb)->s_groups_count))
330 indexv = group >> (EXT4_DESC_PER_BLOCK_BITS(sb));
331 indexh = group & ((EXT4_DESC_PER_BLOCK(sb)) - 1);
332 grp_info = sbi_array_rcu_deref(EXT4_SB(sb), s_group_info, indexv);
340 static ext4_fsblk_t ext4_valid_block_bitmap(struct super_block *sb,
345 struct ext4_sb_info *sbi = EXT4_SB(sb);
348 ext4_grpblk_t max_bit = EXT4_CLUSTERS_PER_GROUP(sb);
352 if (ext4_has_feature_flex_bg(sb)) {
361 group_first_block = ext4_group_first_block_no(sb, block_group);
364 blk = ext4_block_bitmap(sb, desc);
372 blk = ext4_inode_bitmap(sb, desc);
380 blk = ext4_inode_table(sb, desc);
395 static int ext4_validate_block_bitmap(struct super_block *sb,
403 if (EXT4_SB(sb)->s_mount_state & EXT4_FC_REPLAY)
406 grp = ext4_get_group_info(sb, block_group);
413 ext4_lock_group(sb, block_group);
416 if (unlikely(!ext4_block_bitmap_csum_verify(sb, block_group,
418 ext4_simulate_fail(sb, EXT4_SIM_BBITMAP_CRC))) {
419 ext4_unlock_group(sb, block_group);
420 ext4_error(sb, "bg %u: bad block bitmap checksum", block_group);
421 ext4_mark_group_bitmap_corrupted(sb, block_group,
425 blk = ext4_valid_block_bitmap(sb, desc, block_group, bh);
427 ext4_unlock_group(sb, block_group);
428 ext4_error(sb, "bg %u: block %llu: invalid block bitmap",
430 ext4_mark_group_bitmap_corrupted(sb, block_group,
434 blk = ext4_valid_block_bitmap_padding(sb, block_group, bh);
436 ext4_unlock_group(sb, block_group);
437 ext4_error(sb, "bg %u: block %llu: padding at end of block bitmap is not set",
439 ext4_mark_group_bitmap_corrupted(sb, block_group,
445 ext4_unlock_group(sb, block_group);
451 * @sb: super block
460 ext4_read_block_bitmap_nowait(struct super_block *sb, ext4_group_t block_group,
464 struct ext4_sb_info *sbi = EXT4_SB(sb);
469 desc = ext4_get_group_desc(sb, block_group, NULL);
472 bitmap_blk = ext4_block_bitmap(sb, desc);
475 ext4_error(sb, "Invalid block bitmap block %llu in "
477 ext4_mark_group_bitmap_corrupted(sb, block_group,
481 bh = sb_getblk(sb, bitmap_blk);
483 ext4_warning(sb, "Cannot get buffer for block bitmap - "
503 ext4_lock_group(sb, block_group);
504 if (ext4_has_group_desc_csum(sb) &&
507 ext4_unlock_group(sb, block_group);
509 ext4_error(sb, "Block bitmap for bg 0 marked "
514 err = ext4_init_block_bitmap(sb, bh, block_group, desc);
518 ext4_unlock_group(sb, block_group);
521 ext4_error(sb, "Failed to init block bitmap for group "
527 ext4_unlock_group(sb, block_group);
541 trace_ext4_read_block_bitmap_load(sb, block_group, ignore_locked);
547 err = ext4_validate_block_bitmap(sb, desc, block_group, bh);
557 int ext4_wait_block_bitmap(struct super_block *sb, ext4_group_t block_group,
564 desc = ext4_get_group_desc(sb, block_group, NULL);
568 ext4_simulate_fail_bh(sb, bh, EXT4_SIM_BBITMAP_EIO);
570 ext4_error_err(sb, EIO, "Cannot read block bitmap - "
573 ext4_mark_group_bitmap_corrupted(sb, block_group,
579 return ext4_validate_block_bitmap(sb, desc, block_group, bh);
583 ext4_read_block_bitmap(struct super_block *sb, ext4_group_t block_group)
588 bh = ext4_read_block_bitmap_nowait(sb, block_group, false);
591 err = ext4_wait_block_bitmap(sb, block_group, bh);
668 * @sb: superblock
677 int ext4_should_retry_alloc(struct super_block *sb, int *retries)
679 struct ext4_sb_info *sbi = EXT4_SB(sb);
701 jbd_debug(1, "%s: retrying operation after ENOSPC\n", sb->s_id);
748 * @sb: superblock
752 ext4_fsblk_t ext4_count_free_clusters(struct super_block *sb)
757 ext4_group_t ngroups = ext4_get_groups_count(sb);
765 es = EXT4_SB(sb)->s_es;
771 gdp = ext4_get_group_desc(sb, i, NULL);
775 if (EXT4_SB(sb)->s_group_info)
776 grp = ext4_get_group_info(sb, i);
778 desc_count += ext4_free_group_clusters(sb, gdp);
780 bitmap_bh = ext4_read_block_bitmap(sb, i);
787 EXT4_CLUSTERS_PER_GROUP(sb) / 8);
789 i, ext4_free_group_clusters(sb, gdp), x);
795 EXT4_NUM_B2C(EXT4_SB(sb), ext4_free_blocks_count(es)),
801 gdp = ext4_get_group_desc(sb, i, NULL);
805 if (EXT4_SB(sb)->s_group_info)
806 grp = ext4_get_group_info(sb, i);
808 desc_count += ext4_free_group_clusters(sb, gdp);
830 * @sb: superblock for filesystem
836 int ext4_bg_has_super(struct super_block *sb, ext4_group_t group)
838 struct ext4_super_block *es = EXT4_SB(sb)->s_es;
842 if (ext4_has_feature_sparse_super2(sb)) {
848 if ((group <= 1) || !ext4_has_feature_sparse_super(sb))
859 static unsigned long ext4_bg_num_gdb_meta(struct super_block *sb,
862 unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
863 ext4_group_t first = metagroup * EXT4_DESC_PER_BLOCK(sb);
864 ext4_group_t last = first + EXT4_DESC_PER_BLOCK(sb) - 1;
871 static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,
874 if (!ext4_bg_has_super(sb, group))
877 if (ext4_has_feature_meta_bg(sb))
878 return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
880 return EXT4_SB(sb)->s_gdb_count;
885 * @sb: superblock for filesystem
892 unsigned long ext4_bg_num_gdb(struct super_block *sb, ext4_group_t group)
895 le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
896 unsigned long metagroup = group / EXT4_DESC_PER_BLOCK(sb);
898 if (!ext4_has_feature_meta_bg(sb) || metagroup < first_meta_bg)
899 return ext4_bg_num_gdb_nometa(sb, group);
901 return ext4_bg_num_gdb_meta(sb,group);
909 unsigned int ext4_num_base_meta_blocks(struct super_block *sb,
912 struct ext4_sb_info *sbi = EXT4_SB(sb);
916 num = ext4_bg_has_super(sb, block_group);
918 if (!ext4_has_feature_meta_bg(sb) ||
922 num += ext4_bg_num_gdb(sb, block_group);
926 num += ext4_bg_num_gdb(sb, block_group);
931 static unsigned int ext4_num_base_meta_clusters(struct super_block *sb,
934 return EXT4_NUM_B2C(EXT4_SB(sb), ext4_num_base_meta_blocks(sb, block_group));