14 static int exfat_mirror_bh(struct super_block *sb, sector_t sec,  in exfat_mirror_bh()  argument
18 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in exfat_mirror_bh()
24 		c_bh = sb_getblk(sb, sec2);  in exfat_mirror_bh()
27 		memcpy(c_bh->b_data, bh->b_data, sb->s_blocksize);  in exfat_mirror_bh()
30 		if (sb->s_flags & SB_SYNCHRONOUS)  in exfat_mirror_bh()
38 static int __exfat_ent_get(struct super_block *sb, unsigned int loc,  in __exfat_ent_get()  argument
45 	sec = FAT_ENT_OFFSET_SECTOR(sb, loc);  in __exfat_ent_get()
46 	off = FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc);  in __exfat_ent_get()
48 	bh = sb_bread(sb, sec);  in __exfat_ent_get()
62 int exfat_ent_set(struct super_block *sb, unsigned int loc,  in exfat_ent_set()  argument
70 	sec = FAT_ENT_OFFSET_SECTOR(sb, loc);  in exfat_ent_set()
71 	off = FAT_ENT_OFFSET_BYTE_IN_SECTOR(sb, loc);  in exfat_ent_set()
73 	bh = sb_bread(sb, sec);  in exfat_ent_set()
79 	exfat_update_bh(bh, sb->s_flags & SB_SYNCHRONOUS);  in exfat_ent_set()
80 	exfat_mirror_bh(sb, sec, bh);  in exfat_ent_set()
85 int exfat_ent_get(struct super_block *sb, unsigned int loc,  in exfat_ent_get()  argument
88 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in exfat_ent_get()
92 		exfat_fs_error(sb, "invalid access to FAT (entry 0x%08x)",  in exfat_ent_get()
97 	err = __exfat_ent_get(sb, loc, content);  in exfat_ent_get()
99 		exfat_fs_error(sb,  in exfat_ent_get()
106 		exfat_fs_error(sb,  in exfat_ent_get()
113 		exfat_fs_error(sb,  in exfat_ent_get()
120 		exfat_fs_error(sb,  in exfat_ent_get()
129 int exfat_chain_cont_cluster(struct super_block *sb, unsigned int chain,  in exfat_chain_cont_cluster()  argument
136 		if (exfat_ent_set(sb, chain, chain + 1))  in exfat_chain_cont_cluster()
142 	if (exfat_ent_set(sb, chain, EXFAT_EOF_CLUSTER))  in exfat_chain_cont_cluster()
150 	struct super_block *sb = inode->i_sb;  in __exfat_free_cluster()  local
151 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in __exfat_free_cluster()
168 		exfat_err(sb, "invalid start cluster (%u)", p_chain->dir);  in __exfat_free_cluster()
175 		BITMAP_OFFSET_SECTOR_INDEX(sb, CLUSTER_TO_BITMAP_ENT(clu));  in __exfat_free_cluster()
184 				  BITMAP_OFFSET_SECTOR_INDEX(sb, CLUSTER_TO_BITMAP_ENT(clu+1));  in __exfat_free_cluster()
200 			int err = exfat_get_next_cluster(sb, &n_clu);  in __exfat_free_cluster()
206 				  BITMAP_OFFSET_SECTOR_INDEX(sb, CLUSTER_TO_BITMAP_ENT(n_clu));  in __exfat_free_cluster()
238 int exfat_find_last_cluster(struct super_block *sb, struct exfat_chain *p_chain,  in exfat_find_last_cluster()  argument
253 		if (exfat_ent_get(sb, clu, &next))  in exfat_find_last_cluster()
258 		exfat_fs_error(sb,  in exfat_find_last_cluster()
270 	struct super_block *sb = dir->i_sb;  in exfat_zeroed_cluster()  local
271 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in exfat_zeroed_cluster()
279 		exfat_fs_error_ratelimit(sb,  in exfat_zeroed_cluster()
288 		bh = sb_getblk(sb, i);  in exfat_zeroed_cluster()
292 		memset(bh->b_data, 0, sb->s_blocksize);  in exfat_zeroed_cluster()
299 		return sync_blockdev_range(sb->s_bdev,  in exfat_zeroed_cluster()
300 				EXFAT_BLK_TO_B(blknr, sb),  in exfat_zeroed_cluster()
301 				EXFAT_BLK_TO_B(last_blknr, sb) - 1);  in exfat_zeroed_cluster()
312 	struct super_block *sb = inode->i_sb;  in exfat_alloc_cluster()  local
313 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in exfat_alloc_cluster()
318 		exfat_fs_error_ratelimit(sb,  in exfat_alloc_cluster()
333 			exfat_err(sb, "sbi->clu_srch_ptr is invalid (%u)",  in exfat_alloc_cluster()
338 		hint_clu = exfat_find_free_bitmap(sb, sbi->clu_srch_ptr);  in exfat_alloc_cluster()
348 			exfat_err(sb, "hint_cluster is invalid (%u), rewind to the first cluster",  in exfat_alloc_cluster()
356 	while ((new_clu = exfat_find_free_bitmap(sb, hint_clu)) !=  in exfat_alloc_cluster()
360 			if (exfat_chain_cont_cluster(sb, p_chain->dir,  in exfat_alloc_cluster()
376 			if (exfat_ent_set(sb, new_clu, EXFAT_EOF_CLUSTER)) {  in exfat_alloc_cluster()
385 			if (exfat_ent_set(sb, last_clu, new_clu)) {  in exfat_alloc_cluster()
407 				if (exfat_chain_cont_cluster(sb, p_chain->dir,  in exfat_alloc_cluster()
423 int exfat_count_num_clusters(struct super_block *sb,  in exfat_count_num_clusters()  argument
428 	struct exfat_sb_info *sbi = EXFAT_SB(sb);  in exfat_count_num_clusters()
444 		if (exfat_ent_get(sb, clu, &clu))  in exfat_count_num_clusters()