[PATCH v1 2/4] exfat: use upcase_ptable and upcase_range_info to reduce memory footprint

[David Timber <dxdt@dev.snart.me>]

Introduce upcase_ptable("paged up-case table"). Instead of allocating
the entire 131KB of memory(2^16 possible entries times 2 bytes), break
up the upcase table into 1024-byte pages and do not allocate memory
for pages containing no data. The size of default upcase table
populated during module initialisation is 8KB.

Reduce the size of .rodata section further by employing
exfat_upcase_range_info, each representing a run in the unicode BMP.
Each entry in exfat_def_utbl_ri represent the exact copy of the
"recommended upcase table" from the exFAT spec but compressed in a
format of our own(less than 1KB of .rodata compared to 5836 bytes of
the compressed format in the spec).

When the contents of the upcase table loaded from the volume is
identical to that of the default upcase table during mounting process,
free the memory dynamically allocated to load the table and set up the
super block to use the default table already populated during module
initialisation.

As a custom upcase table is almost never used, keeping a copy of upcase
table for every super block is wasteful. If one is used, it means that
name hashing behaviour may not work as expected so warn the user by
printing a kernel message.

Signed-off-by: David Timber <dxdt@dev.snart.me>
---
 fs/exfat/Makefile   |    2 +-
 fs/exfat/exfat_fs.h |   54 +-
 fs/exfat/nls.c      |  140 ++---
 fs/exfat/super.c    |    7 +
 fs/exfat/tables.c   | 1190 +++++++++++++++++++++++++++++--------------
 fs/exfat/upcase.c   |   70 +++
 6 files changed, 1029 insertions(+), 434 deletions(-)
 create mode 100644 fs/exfat/upcase.c

diff --git a/fs/exfat/Makefile b/fs/exfat/Makefile
index 63e8e91c2ff3..81618ac12a72 100644
--- a/fs/exfat/Makefile
+++ b/fs/exfat/Makefile
@@ -5,4 +5,4 @@
 obj-$(CONFIG_EXFAT_FS) += exfat.o
 
 exfat-y	:= inode.o namei.o dir.o super.o fatent.o cache.o nls.o misc.o \
-	   file.o balloc.o tables.o
+	   file.o balloc.o tables.o upcase.o
diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index 3c99be1ecdc8..057ae8225a57 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -11,6 +11,7 @@
 #include <linux/nls.h>
 #include <linux/blkdev.h>
 #include <linux/backing-dev.h>
+#include <linux/build_bug.h>
 #include <uapi/linux/exfat.h>
 
 #define EXFAT_ROOT_INO		1
@@ -223,6 +224,30 @@ struct exfat_dir_entry {
 	struct exfat_dentry_namebuf namebuf;
 };
 
+/*
+ * exfat upcase paged table
+ */
+/* magic values */
+#define EXFAT_UPTBL_PAGESIZE	(512)
+#define EXFAT_UPTBL_SIZE	(1 << 16)
+#define EXFAT_UPTBL_ARRSIZE	(EXFAT_UPTBL_SIZE / EXFAT_UPTBL_PAGESIZE)
+
+struct exfat_upcase_ptable {
+	__u16 *pages[EXFAT_UPTBL_ARRSIZE];
+	size_t cnt;
+};
+
+struct exfat_upcase_range_info {
+	__u16 start;
+	__u16 end;
+	__u16 value;
+	__u16 inc;
+};
+
+/* some safety checks */
+static_assert(EXFAT_UPTBL_SIZE % EXFAT_UPTBL_PAGESIZE == 0);
+static_assert(0xFFFF / EXFAT_UPTBL_PAGESIZE < EXFAT_UPTBL_ARRSIZE);
+
 /*
  * exfat mount in-memory data
  */
@@ -270,7 +295,8 @@ struct exfat_sb_info {
 	unsigned int map_sectors; /* num of allocation bitmap sectors */
 	struct buffer_head **vol_amap; /* allocation bitmap */
 
-	unsigned short *vol_utbl; /* upcase table */
+	const struct exfat_upcase_ptable *vol_utbl; /* selected upcase ptable */
+	struct exfat_upcase_ptable *vol_utbl_own; /* loaded upcase ptable, if not default */
 
 	unsigned int clu_srch_ptr; /* cluster search pointer */
 	unsigned int used_clusters; /* number of used clusters */
@@ -598,6 +624,8 @@ int exfat_nls_to_utf16(struct super_block *sb,
 		struct exfat_uni_name *uniname, int *p_lossy);
 int exfat_create_upcase_table(struct super_block *sb);
 void exfat_free_upcase_table(struct exfat_sb_info *sbi);
+int exfat_init_default_upcase_ptable(void);
+void exfat_free_default_upcase_ptable(void);
 
 /* exfat/misc.c */
 void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
@@ -608,12 +636,30 @@ void __exfat_fs_error(struct super_block *sb, int report, const char *fmt, ...)
 		__exfat_fs_error(sb, __ratelimit(&EXFAT_SB(sb)->ratelimit), \
 		fmt, ## args)
 
+/* exfat/upcase.c */
+int exfat_set_upcase_ptable(struct exfat_upcase_ptable *ptbl,
+		const __u16 index, const __u16 value);
+
+static inline __u16 exfat_lookup_upcase_ptable(const struct exfat_upcase_ptable *ptbl,
+		const __u16 index)
+{
+	const size_t page_idx = index / EXFAT_UPTBL_PAGESIZE;
+	const size_t idx_in_page = index % EXFAT_UPTBL_PAGESIZE;
+
+	return ptbl->pages[page_idx] == NULL ? 0 : ptbl->pages[page_idx][idx_in_page];
+}
+
+void exfat_free_upcase_ptable(struct exfat_upcase_ptable *ptbl);
+int exfat_populate_upcase_ptable(struct exfat_upcase_ptable *ptbl,
+		const struct exfat_upcase_range_info *ri,
+		const size_t cnt);
+
 /* exfat/tables.c */
 /* Upcase table macro */
-#define EXFAT_NUM_UPCASE	(2918)
-#define EXFAT_UTBL_COUNT	(0x10000)
+#define EXFAT_DEF_UTBL_RI_COUNT	(112)
+#define EXFAT_DEF_UTBL_CHKSUM	(0xE619D30D)
 
-extern const unsigned short exfat_uni_def_upcase[EXFAT_NUM_UPCASE];
+extern const struct exfat_upcase_range_info exfat_def_utbl_ri[EXFAT_DEF_UTBL_RI_COUNT];
 extern const unsigned short exfat_bad_uni_chars[];
 
 /* expand to pr_*() with prefix */
diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c
index 7e85d15ffc0b..c56d501659b3 100644
--- a/fs/exfat/nls.c
+++ b/fs/exfat/nls.c
@@ -11,6 +11,8 @@
 #include "exfat_raw.h"
 #include "exfat_fs.h"
 
+static struct exfat_upcase_ptable default_upcase_table;
+
 static int exfat_convert_char_to_ucs2(struct nls_table *nls,
 		const unsigned char *ch, int ch_len, unsigned short *ucs2,
 		int *lossy)
@@ -61,8 +63,11 @@ static int exfat_convert_ucs2_to_char(struct nls_table *nls,
 unsigned short exfat_toupper(struct super_block *sb, unsigned short a)
 {
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
+	unsigned short ret;
+
+	ret = exfat_lookup_upcase_ptable(sbi->vol_utbl, a);
 
-	return sbi->vol_utbl[a] ? sbi->vol_utbl[a] : a;
+	return ret ? ret : a;
 }
 
 static const unsigned short *exfat_wstrchr(const unsigned short *str,
@@ -263,14 +268,18 @@ static int exfat_load_upcase_table(struct super_block *sb,
 	unsigned int i, index = 0;
 	u32 chksum = 0;
 	unsigned char skip = false;
-	unsigned short *upcase_table;
+	struct exfat_upcase_ptable *upcase_table;
+	unsigned short def_upcase;
+	bool is_default;
+	unsigned int entries = 0;
+	int ret = -EINVAL;
 
-	upcase_table = kvcalloc(EXFAT_UTBL_COUNT, sizeof(unsigned short), GFP_KERNEL);
+	upcase_table = kvcalloc(1, sizeof(struct exfat_upcase_ptable), GFP_KERNEL);
 	if (!upcase_table)
 		return -ENOMEM;
 
-	sbi->vol_utbl = upcase_table;
 	num_sectors += sector;
+	is_default = sector < num_sectors;
 
 	while (sector < num_sectors) {
 		struct buffer_head *bh;
@@ -279,7 +288,8 @@ static int exfat_load_upcase_table(struct super_block *sb,
 		if (!bh) {
 			exfat_err(sb, "failed to read sector(0x%llx)",
 				  (unsigned long long)sector);
-			return -EIO;
+			ret = -EIO;
+			goto err;
 		}
 		sector++;
 		for (i = 0; i < sect_size && index <= 0xFFFF; i += 2) {
@@ -293,7 +303,17 @@ static int exfat_load_upcase_table(struct super_block *sb,
 			} else if (uni == 0xFFFF) {
 				skip = true;
 			} else { /* uni != index , uni != 0xFFFF */
-				upcase_table[index] = uni;
+				ret = exfat_set_upcase_ptable(upcase_table, index, uni);
+				if (ret) {
+					brelse(bh);
+					goto err;
+				}
+
+				def_upcase = exfat_lookup_upcase_ptable(&default_upcase_table,
+									index);
+				is_default &= def_upcase == uni;
+
+				entries++;
 				index++;
 			}
 		}
@@ -301,53 +321,36 @@ static int exfat_load_upcase_table(struct super_block *sb,
 		brelse(bh);
 	}
 
-	if (index >= 0xFFFF && utbl_checksum == chksum)
+	if (index >= 0xFFFF && utbl_checksum == chksum) {
+		/*
+		 * is_default being set does not necessarily mean the contents are exact same as the
+		 * upcase table loaded from the volume may be missing some entries. The checksum
+		 * matching should be enough to cover that case.
+		 */
+		if (is_default && utbl_checksum == EXFAT_DEF_UTBL_CHKSUM) {
+			exfat_free_upcase_ptable(upcase_table);
+			kvfree(upcase_table);
+		} else {
+			sbi->vol_utbl = sbi->vol_utbl_own = upcase_table;
+			exfat_info(sb, "using non-default upcase table (chksum: 0x%08x, entries: %u, memsize: %zu+)",
+				   chksum, entries, upcase_table->cnt * EXFAT_UPTBL_PAGESIZE);
+		}
+
 		return 0;
+	}
 
 	exfat_err(sb, "failed to load upcase table (idx : 0x%08x, chksum : 0x%08x, utbl_chksum : 0x%08x)",
 		  index, chksum, utbl_checksum);
-	return -EINVAL;
-}
-
-static int exfat_load_default_upcase_table(struct super_block *sb)
-{
-	int i;
-	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	unsigned char skip = false;
-	unsigned short uni = 0, *upcase_table;
-	unsigned int index = 0;
-
-	upcase_table = kvcalloc(EXFAT_UTBL_COUNT, sizeof(unsigned short), GFP_KERNEL);
-	if (!upcase_table)
-		return -ENOMEM;
-
-	sbi->vol_utbl = upcase_table;
-
-	for (i = 0; index <= 0xFFFF && i < EXFAT_NUM_UPCASE; i++) {
-		uni = exfat_uni_def_upcase[i];
-		if (skip) {
-			index += uni;
-			skip = false;
-		} else if (uni == index) {
-			index++;
-		} else if (uni == 0xFFFF) {
-			skip = true;
-		} else {
-			upcase_table[index] = uni;
-			index++;
-		}
-	}
 
-	if (index >= 0xFFFF)
-		return 0;
+err:
+	exfat_free_upcase_ptable(upcase_table);
+	kvfree(upcase_table);
 
-	/* FATAL error: default upcase table has error */
-	return -EIO;
+	return ret;
 }
 
 int exfat_create_upcase_table(struct super_block *sb)
 {
-	int i, ret;
 	unsigned int tbl_clu, type;
 	sector_t sector;
 	unsigned long long tbl_size, num_sectors;
@@ -357,11 +360,16 @@ int exfat_create_upcase_table(struct super_block *sb)
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	struct buffer_head *bh;
 
+	/* fallback to the default table on error */
+	sbi->vol_utbl = &default_upcase_table;
+
 	clu.dir = sbi->root_dir;
 	clu.flags = ALLOC_FAT_CHAIN;
 
 	while (clu.dir != EXFAT_EOF_CLUSTER) {
-		for (i = 0; i < sbi->dentries_per_clu; i++) {
+		for (unsigned int i = 0; i < sbi->dentries_per_clu; i++) {
+			int ret = 0;
+
 			ep = exfat_get_dentry(sb, &clu, i, &bh);
 			if (!ep)
 				return -EIO;
@@ -384,20 +392,13 @@ int exfat_create_upcase_table(struct super_block *sb)
 				num_sectors = ((tbl_size - 1) >> blksize_bits) + 1;
 				ret = exfat_load_upcase_table(sb, sector, num_sectors,
 					le32_to_cpu(ep->dentry.upcase.checksum));
-			} else {
+			} else
 				exfat_fs_error(sb,
 					       "bad upcase table size (0 bytes). Please run fsck");
-				ret = -EINVAL;
-			}
-			brelse(bh);
 
-			if (ret && ret != -EIO) {
-				/* free memory from exfat_load_upcase_table call */
-				exfat_free_upcase_table(sbi);
-				goto load_default;
-			}
-
-			/* load successfully */
+			brelse(bh);
+			if (ret && ret != -EIO)
+				ret = 0;
 			return ret;
 		}
 
@@ -407,13 +408,32 @@ int exfat_create_upcase_table(struct super_block *sb)
 
 	exfat_fs_error(sb, "no upcase table entry. Please run fsck");
 
-load_default:
-	/* load default upcase table */
-	return exfat_load_default_upcase_table(sb);
+	return 0;
 }
 
 void exfat_free_upcase_table(struct exfat_sb_info *sbi)
 {
-	kvfree(sbi->vol_utbl);
-	sbi->vol_utbl = NULL;
+	exfat_free_upcase_ptable(sbi->vol_utbl_own);
+	kvfree(sbi->vol_utbl_own);
+	sbi->vol_utbl = sbi->vol_utbl_own = NULL;
+}
+
+int exfat_init_default_upcase_ptable(void)
+{
+	int err;
+
+	err = exfat_populate_upcase_ptable(&default_upcase_table,
+					   exfat_def_utbl_ri,
+					   EXFAT_DEF_UTBL_RI_COUNT);
+	if (err) {
+		exfat_free_upcase_ptable(&default_upcase_table);
+		return err;
+	}
+
+	return 0;
+}
+
+void exfat_free_default_upcase_ptable(void)
+{
+	exfat_free_upcase_ptable(&default_upcase_table);
 }
diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 95d87e2d7717..200d93bd5abd 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -896,6 +896,12 @@ static int __init init_exfat_fs(void)
 {
 	int err;
 
+	err = exfat_init_default_upcase_ptable();
+	if (err) {
+		WARN_ON(err == -EINVAL);
+		return err;
+	}
+
 	err = exfat_cache_init();
 	if (err)
 		return err;
@@ -932,6 +938,7 @@ static void __exit exit_exfat_fs(void)
 	kmem_cache_destroy(exfat_inode_cachep);
 	unregister_filesystem(&exfat_fs_type);
 	exfat_cache_shutdown();
+	exfat_free_default_upcase_ptable();
 }
 
 module_init(init_exfat_fs);
diff --git a/fs/exfat/tables.c b/fs/exfat/tables.c
index d8efade76979..b62f0f5ad6e4 100644
--- a/fs/exfat/tables.c
+++ b/fs/exfat/tables.c
@@ -6,376 +6,828 @@
 #include "exfat_fs.h"
 
 /*
- * Upcase table in compressed format (7.2.5.1 Recommended Up-case Table
- * in exfat specification, See:
- * https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification).
+ * The recommended upcase table(7.2.5.1 Recommended Up-case Table in exfat
+ * specification available at
+ * https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification),
+ * expressed in Linux's own format.
+ *
+ * It is found that the table contains following errors or subtle caveats.
+ *
+ *   - Uppercase converted to lowercase
+ *     - U+023A -> U+2C65
+ *     - U+023E -> U+2C66
+ *     - U+1FCC -> U+1FC3
+ *     - U+1FFC -> U+1FF3
+ *   - Letters that have multiple corresponding lower or upper case letters(Greek letter sigma)
+ *     - U+03C2 -> U+03C3
+ *     - U+03C3 -> U+03C2
+ *
+ * To maintain interoperability, these errors are not corrected.
  */
-const unsigned short exfat_uni_def_upcase[EXFAT_NUM_UPCASE] = {
-	0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007,
-	0x0008, 0x0009, 0x000a, 0x000b, 0x000c, 0x000d, 0x000e, 0x000f,
-	0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017,
-	0x0018, 0x0019, 0x001a, 0x001b, 0x001c, 0x001d, 0x001e, 0x001f,
-	0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
-	0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
-	0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
-	0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
-	0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
-	0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
-	0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
-	0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
-	0x0060, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
-	0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
-	0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
-	0x0058, 0x0059, 0x005a, 0x007b, 0x007c, 0x007d, 0x007e, 0x007f,
-	0x0080, 0x0081, 0x0082, 0x0083, 0x0084, 0x0085, 0x0086, 0x0087,
-	0x0088, 0x0089, 0x008a, 0x008b, 0x008c, 0x008d, 0x008e, 0x008f,
-	0x0090, 0x0091, 0x0092, 0x0093, 0x0094, 0x0095, 0x0096, 0x0097,
-	0x0098, 0x0099, 0x009a, 0x009b, 0x009c, 0x009d, 0x009e, 0x009f,
-	0x00a0, 0x00a1, 0x00a2, 0x00a3, 0x00a4, 0x00a5, 0x00a6, 0x00a7,
-	0x00a8, 0x00a9, 0x00aa, 0x00ab, 0x00ac, 0x00ad, 0x00ae, 0x00af,
-	0x00b0, 0x00b1, 0x00b2, 0x00b3, 0x00b4, 0x00b5, 0x00b6, 0x00b7,
-	0x00b8, 0x00b9, 0x00ba, 0x00bb, 0x00bc, 0x00bd, 0x00be, 0x00bf,
-	0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
-	0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
-	0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00d7,
-	0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x00df,
-	0x00c0, 0x00c1, 0x00c2, 0x00c3, 0x00c4, 0x00c5, 0x00c6, 0x00c7,
-	0x00c8, 0x00c9, 0x00ca, 0x00cb, 0x00cc, 0x00cd, 0x00ce, 0x00cf,
-	0x00d0, 0x00d1, 0x00d2, 0x00d3, 0x00d4, 0x00d5, 0x00d6, 0x00f7,
-	0x00d8, 0x00d9, 0x00da, 0x00db, 0x00dc, 0x00dd, 0x00de, 0x0178,
-	0x0100, 0x0100, 0x0102, 0x0102, 0x0104, 0x0104, 0x0106, 0x0106,
-	0x0108, 0x0108, 0x010a, 0x010a, 0x010c, 0x010c, 0x010e, 0x010e,
-	0x0110, 0x0110, 0x0112, 0x0112, 0x0114, 0x0114, 0x0116, 0x0116,
-	0x0118, 0x0118, 0x011a, 0x011a, 0x011c, 0x011c, 0x011e, 0x011e,
-	0x0120, 0x0120, 0x0122, 0x0122, 0x0124, 0x0124, 0x0126, 0x0126,
-	0x0128, 0x0128, 0x012a, 0x012a, 0x012c, 0x012c, 0x012e, 0x012e,
-	0x0130, 0x0131, 0x0132, 0x0132, 0x0134, 0x0134, 0x0136, 0x0136,
-	0x0138, 0x0139, 0x0139, 0x013b, 0x013b, 0x013d, 0x013d, 0x013f,
-	0x013f, 0x0141, 0x0141, 0x0143, 0x0143, 0x0145, 0x0145, 0x0147,
-	0x0147, 0x0149, 0x014a, 0x014a, 0x014c, 0x014c, 0x014e, 0x014e,
-	0x0150, 0x0150, 0x0152, 0x0152, 0x0154, 0x0154, 0x0156, 0x0156,
-	0x0158, 0x0158, 0x015a, 0x015a, 0x015c, 0x015c, 0x015e, 0x015e,
-	0x0160, 0x0160, 0x0162, 0x0162, 0x0164, 0x0164, 0x0166, 0x0166,
-	0x0168, 0x0168, 0x016a, 0x016a, 0x016c, 0x016c, 0x016e, 0x016e,
-	0x0170, 0x0170, 0x0172, 0x0172, 0x0174, 0x0174, 0x0176, 0x0176,
-	0x0178, 0x0179, 0x0179, 0x017b, 0x017b, 0x017d, 0x017d, 0x017f,
-	0x0243, 0x0181, 0x0182, 0x0182, 0x0184, 0x0184, 0x0186, 0x0187,
-	0x0187, 0x0189, 0x018a, 0x018b, 0x018b, 0x018d, 0x018e, 0x018f,
-	0x0190, 0x0191, 0x0191, 0x0193, 0x0194, 0x01f6, 0x0196, 0x0197,
-	0x0198, 0x0198, 0x023d, 0x019b, 0x019c, 0x019d, 0x0220, 0x019f,
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-	0x1ecc, 0x1ecc, 0x1ece, 0x1ece, 0x1ed0, 0x1ed0, 0x1ed2, 0x1ed2,
-	0x1ed4, 0x1ed4, 0x1ed6, 0x1ed6, 0x1ed8, 0x1ed8, 0x1eda, 0x1eda,
-	0x1edc, 0x1edc, 0x1ede, 0x1ede, 0x1ee0, 0x1ee0, 0x1ee2, 0x1ee2,
-	0x1ee4, 0x1ee4, 0x1ee6, 0x1ee6, 0x1ee8, 0x1ee8, 0x1eea, 0x1eea,
-	0x1eec, 0x1eec, 0x1eee, 0x1eee, 0x1ef0, 0x1ef0, 0x1ef2, 0x1ef2,
-	0x1ef4, 0x1ef4, 0x1ef6, 0x1ef6, 0x1ef8, 0x1ef8, 0x1efa, 0x1efb,
-	0x1efc, 0x1efd, 0x1efe, 0x1eff, 0x1f08, 0x1f09, 0x1f0a, 0x1f0b,
-	0x1f0c, 0x1f0d, 0x1f0e, 0x1f0f, 0x1f08, 0x1f09, 0x1f0a, 0x1f0b,
-	0x1f0c, 0x1f0d, 0x1f0e, 0x1f0f, 0x1f18, 0x1f19, 0x1f1a, 0x1f1b,
-	0x1f1c, 0x1f1d, 0x1f16, 0x1f17, 0x1f18, 0x1f19, 0x1f1a, 0x1f1b,
-	0x1f1c, 0x1f1d, 0x1f1e, 0x1f1f, 0x1f28, 0x1f29, 0x1f2a, 0x1f2b,
-	0x1f2c, 0x1f2d, 0x1f2e, 0x1f2f, 0x1f28, 0x1f29, 0x1f2a, 0x1f2b,
-	0x1f2c, 0x1f2d, 0x1f2e, 0x1f2f, 0x1f38, 0x1f39, 0x1f3a, 0x1f3b,
-	0x1f3c, 0x1f3d, 0x1f3e, 0x1f3f, 0x1f38, 0x1f39, 0x1f3a, 0x1f3b,
-	0x1f3c, 0x1f3d, 0x1f3e, 0x1f3f, 0x1f48, 0x1f49, 0x1f4a, 0x1f4b,
-	0x1f4c, 0x1f4d, 0x1f46, 0x1f47, 0x1f48, 0x1f49, 0x1f4a, 0x1f4b,
-	0x1f4c, 0x1f4d, 0x1f4e, 0x1f4f, 0x1f50, 0x1f59, 0x1f52, 0x1f5b,
-	0x1f54, 0x1f5d, 0x1f56, 0x1f5f, 0x1f58, 0x1f59, 0x1f5a, 0x1f5b,
-	0x1f5c, 0x1f5d, 0x1f5e, 0x1f5f, 0x1f68, 0x1f69, 0x1f6a, 0x1f6b,
-	0x1f6c, 0x1f6d, 0x1f6e, 0x1f6f, 0x1f68, 0x1f69, 0x1f6a, 0x1f6b,
-	0x1f6c, 0x1f6d, 0x1f6e, 0x1f6f, 0x1fba, 0x1fbb, 0x1fc8, 0x1fc9,
-	0x1fca, 0x1fcb, 0x1fda, 0x1fdb, 0x1ff8, 0x1ff9, 0x1fea, 0x1feb,
-	0x1ffa, 0x1ffb, 0x1f7e, 0x1f7f, 0x1f88, 0x1f89, 0x1f8a, 0x1f8b,
-	0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f, 0x1f88, 0x1f89, 0x1f8a, 0x1f8b,
-	0x1f8c, 0x1f8d, 0x1f8e, 0x1f8f, 0x1f98, 0x1f99, 0x1f9a, 0x1f9b,
-	0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f, 0x1f98, 0x1f99, 0x1f9a, 0x1f9b,
-	0x1f9c, 0x1f9d, 0x1f9e, 0x1f9f, 0x1fa8, 0x1fa9, 0x1faa, 0x1fab,
-	0x1fac, 0x1fad, 0x1fae, 0x1faf, 0x1fa8, 0x1fa9, 0x1faa, 0x1fab,
-	0x1fac, 0x1fad, 0x1fae, 0x1faf, 0x1fb8, 0x1fb9, 0x1fb2, 0x1fbc,
-	0x1fb4, 0x1fb5, 0x1fb6, 0x1fb7, 0x1fb8, 0x1fb9, 0x1fba, 0x1fbb,
-	0x1fbc, 0x1fbd, 0x1fbe, 0x1fbf, 0x1fc0, 0x1fc1, 0x1fc2, 0x1fc3,
-	0x1fc4, 0x1fc5, 0x1fc6, 0x1fc7, 0x1fc8, 0x1fc9, 0x1fca, 0x1fcb,
-	0x1fc3, 0x1fcd, 0x1fce, 0x1fcf, 0x1fd8, 0x1fd9, 0x1fd2, 0x1fd3,
-	0x1fd4, 0x1fd5, 0x1fd6, 0x1fd7, 0x1fd8, 0x1fd9, 0x1fda, 0x1fdb,
-	0x1fdc, 0x1fdd, 0x1fde, 0x1fdf, 0x1fe8, 0x1fe9, 0x1fe2, 0x1fe3,
-	0x1fe4, 0x1fec, 0x1fe6, 0x1fe7, 0x1fe8, 0x1fe9, 0x1fea, 0x1feb,
-	0x1fec, 0x1fed, 0x1fee, 0x1fef, 0x1ff0, 0x1ff1, 0x1ff2, 0x1ff3,
-	0x1ff4, 0x1ff5, 0x1ff6, 0x1ff7, 0x1ff8, 0x1ff9, 0x1ffa, 0x1ffb,
-	0x1ff3, 0x1ffd, 0x1ffe, 0x1fff, 0x2000, 0x2001, 0x2002, 0x2003,
-	0x2004, 0x2005, 0x2006, 0x2007, 0x2008, 0x2009, 0x200a, 0x200b,
-	0x200c, 0x200d, 0x200e, 0x200f, 0x2010, 0x2011, 0x2012, 0x2013,
-	0x2014, 0x2015, 0x2016, 0x2017, 0x2018, 0x2019, 0x201a, 0x201b,
-	0x201c, 0x201d, 0x201e, 0x201f, 0x2020, 0x2021, 0x2022, 0x2023,
-	0x2024, 0x2025, 0x2026, 0x2027, 0x2028, 0x2029, 0x202a, 0x202b,
-	0x202c, 0x202d, 0x202e, 0x202f, 0x2030, 0x2031, 0x2032, 0x2033,
-	0x2034, 0x2035, 0x2036, 0x2037, 0x2038, 0x2039, 0x203a, 0x203b,
-	0x203c, 0x203d, 0x203e, 0x203f, 0x2040, 0x2041, 0x2042, 0x2043,
-	0x2044, 0x2045, 0x2046, 0x2047, 0x2048, 0x2049, 0x204a, 0x204b,
-	0x204c, 0x204d, 0x204e, 0x204f, 0x2050, 0x2051, 0x2052, 0x2053,
-	0x2054, 0x2055, 0x2056, 0x2057, 0x2058, 0x2059, 0x205a, 0x205b,
-	0x205c, 0x205d, 0x205e, 0x205f, 0x2060, 0x2061, 0x2062, 0x2063,
-	0x2064, 0x2065, 0x2066, 0x2067, 0x2068, 0x2069, 0x206a, 0x206b,
-	0x206c, 0x206d, 0x206e, 0x206f, 0x2070, 0x2071, 0x2072, 0x2073,
-	0x2074, 0x2075, 0x2076, 0x2077, 0x2078, 0x2079, 0x207a, 0x207b,
-	0x207c, 0x207d, 0x207e, 0x207f, 0x2080, 0x2081, 0x2082, 0x2083,
-	0x2084, 0x2085, 0x2086, 0x2087, 0x2088, 0x2089, 0x208a, 0x208b,
-	0x208c, 0x208d, 0x208e, 0x208f, 0x2090, 0x2091, 0x2092, 0x2093,
-	0x2094, 0x2095, 0x2096, 0x2097, 0x2098, 0x2099, 0x209a, 0x209b,
-	0x209c, 0x209d, 0x209e, 0x209f, 0x20a0, 0x20a1, 0x20a2, 0x20a3,
-	0x20a4, 0x20a5, 0x20a6, 0x20a7, 0x20a8, 0x20a9, 0x20aa, 0x20ab,
-	0x20ac, 0x20ad, 0x20ae, 0x20af, 0x20b0, 0x20b1, 0x20b2, 0x20b3,
-	0x20b4, 0x20b5, 0x20b6, 0x20b7, 0x20b8, 0x20b9, 0x20ba, 0x20bb,
-	0x20bc, 0x20bd, 0x20be, 0x20bf, 0x20c0, 0x20c1, 0x20c2, 0x20c3,
-	0x20c4, 0x20c5, 0x20c6, 0x20c7, 0x20c8, 0x20c9, 0x20ca, 0x20cb,
-	0x20cc, 0x20cd, 0x20ce, 0x20cf, 0x20d0, 0x20d1, 0x20d2, 0x20d3,
-	0x20d4, 0x20d5, 0x20d6, 0x20d7, 0x20d8, 0x20d9, 0x20da, 0x20db,
-	0x20dc, 0x20dd, 0x20de, 0x20df, 0x20e0, 0x20e1, 0x20e2, 0x20e3,
-	0x20e4, 0x20e5, 0x20e6, 0x20e7, 0x20e8, 0x20e9, 0x20ea, 0x20eb,
-	0x20ec, 0x20ed, 0x20ee, 0x20ef, 0x20f0, 0x20f1, 0x20f2, 0x20f3,
-	0x20f4, 0x20f5, 0x20f6, 0x20f7, 0x20f8, 0x20f9, 0x20fa, 0x20fb,
-	0x20fc, 0x20fd, 0x20fe, 0x20ff, 0x2100, 0x2101, 0x2102, 0x2103,
-	0x2104, 0x2105, 0x2106, 0x2107, 0x2108, 0x2109, 0x210a, 0x210b,
-	0x210c, 0x210d, 0x210e, 0x210f, 0x2110, 0x2111, 0x2112, 0x2113,
-	0x2114, 0x2115, 0x2116, 0x2117, 0x2118, 0x2119, 0x211a, 0x211b,
-	0x211c, 0x211d, 0x211e, 0x211f, 0x2120, 0x2121, 0x2122, 0x2123,
-	0x2124, 0x2125, 0x2126, 0x2127, 0x2128, 0x2129, 0x212a, 0x212b,
-	0x212c, 0x212d, 0x212e, 0x212f, 0x2130, 0x2131, 0x2132, 0x2133,
-	0x2134, 0x2135, 0x2136, 0x2137, 0x2138, 0x2139, 0x213a, 0x213b,
-	0x213c, 0x213d, 0x213e, 0x213f, 0x2140, 0x2141, 0x2142, 0x2143,
-	0x2144, 0x2145, 0x2146, 0x2147, 0x2148, 0x2149, 0x214a, 0x214b,
-	0x214c, 0x214d, 0x2132, 0x214f, 0x2150, 0x2151, 0x2152, 0x2153,
-	0x2154, 0x2155, 0x2156, 0x2157, 0x2158, 0x2159, 0x215a, 0x215b,
-	0x215c, 0x215d, 0x215e, 0x215f, 0x2160, 0x2161, 0x2162, 0x2163,
-	0x2164, 0x2165, 0x2166, 0x2167, 0x2168, 0x2169, 0x216a, 0x216b,
-	0x216c, 0x216d, 0x216e, 0x216f, 0x2160, 0x2161, 0x2162, 0x2163,
-	0x2164, 0x2165, 0x2166, 0x2167, 0x2168, 0x2169, 0x216a, 0x216b,
-	0x216c, 0x216d, 0x216e, 0x216f, 0x2180, 0x2181, 0x2182, 0x2183,
-	0x2183, 0xffff, 0x034b, 0x24b6, 0x24b7, 0x24b8, 0x24b9, 0x24ba,
-	0x24bb, 0x24bc, 0x24bd, 0x24be, 0x24bf, 0x24c0, 0x24c1, 0x24c2,
-	0x24c3, 0x24c4, 0x24c5, 0x24c6, 0x24c7, 0x24c8, 0x24c9, 0x24ca,
-	0x24cb, 0x24cc, 0x24cd, 0x24ce, 0x24cf, 0xffff, 0x0746, 0x2c00,
-	0x2c01, 0x2c02, 0x2c03, 0x2c04, 0x2c05, 0x2c06, 0x2c07, 0x2c08,
-	0x2c09, 0x2c0a, 0x2c0b, 0x2c0c, 0x2c0d, 0x2c0e, 0x2c0f, 0x2c10,
-	0x2c11, 0x2c12, 0x2c13, 0x2c14, 0x2c15, 0x2c16, 0x2c17, 0x2c18,
-	0x2c19, 0x2c1a, 0x2c1b, 0x2c1c, 0x2c1d, 0x2c1e, 0x2c1f, 0x2c20,
-	0x2c21, 0x2c22, 0x2c23, 0x2c24, 0x2c25, 0x2c26, 0x2c27, 0x2c28,
-	0x2c29, 0x2c2a, 0x2c2b, 0x2c2c, 0x2c2d, 0x2c2e, 0x2c5f, 0x2c60,
-	0x2c60, 0x2c62, 0x2c63, 0x2c64, 0x2c65, 0x2c66, 0x2c67, 0x2c67,
-	0x2c69, 0x2c69, 0x2c6b, 0x2c6b, 0x2c6d, 0x2c6e, 0x2c6f, 0x2c70,
-	0x2c71, 0x2c72, 0x2c73, 0x2c74, 0x2c75, 0x2c75, 0x2c77, 0x2c78,
-	0x2c79, 0x2c7a, 0x2c7b, 0x2c7c, 0x2c7d, 0x2c7e, 0x2c7f, 0x2c80,
-	0x2c80, 0x2c82, 0x2c82, 0x2c84, 0x2c84, 0x2c86, 0x2c86, 0x2c88,
-	0x2c88, 0x2c8a, 0x2c8a, 0x2c8c, 0x2c8c, 0x2c8e, 0x2c8e, 0x2c90,
-	0x2c90, 0x2c92, 0x2c92, 0x2c94, 0x2c94, 0x2c96, 0x2c96, 0x2c98,
-	0x2c98, 0x2c9a, 0x2c9a, 0x2c9c, 0x2c9c, 0x2c9e, 0x2c9e, 0x2ca0,
-	0x2ca0, 0x2ca2, 0x2ca2, 0x2ca4, 0x2ca4, 0x2ca6, 0x2ca6, 0x2ca8,
-	0x2ca8, 0x2caa, 0x2caa, 0x2cac, 0x2cac, 0x2cae, 0x2cae, 0x2cb0,
-	0x2cb0, 0x2cb2, 0x2cb2, 0x2cb4, 0x2cb4, 0x2cb6, 0x2cb6, 0x2cb8,
-	0x2cb8, 0x2cba, 0x2cba, 0x2cbc, 0x2cbc, 0x2cbe, 0x2cbe, 0x2cc0,
-	0x2cc0, 0x2cc2, 0x2cc2, 0x2cc4, 0x2cc4, 0x2cc6, 0x2cc6, 0x2cc8,
-	0x2cc8, 0x2cca, 0x2cca, 0x2ccc, 0x2ccc, 0x2cce, 0x2cce, 0x2cd0,
-	0x2cd0, 0x2cd2, 0x2cd2, 0x2cd4, 0x2cd4, 0x2cd6, 0x2cd6, 0x2cd8,
-	0x2cd8, 0x2cda, 0x2cda, 0x2cdc, 0x2cdc, 0x2cde, 0x2cde, 0x2ce0,
-	0x2ce0, 0x2ce2, 0x2ce2, 0x2ce4, 0x2ce5, 0x2ce6, 0x2ce7, 0x2ce8,
-	0x2ce9, 0x2cea, 0x2ceb, 0x2cec, 0x2ced, 0x2cee, 0x2cef, 0x2cf0,
-	0x2cf1, 0x2cf2, 0x2cf3, 0x2cf4, 0x2cf5, 0x2cf6, 0x2cf7, 0x2cf8,
-	0x2cf9, 0x2cfa, 0x2cfb, 0x2cfc, 0x2cfd, 0x2cfe, 0x2cff, 0x10a0,
-	0x10a1, 0x10a2, 0x10a3, 0x10a4, 0x10a5, 0x10a6, 0x10a7, 0x10a8,
-	0x10a9, 0x10aa, 0x10ab, 0x10ac, 0x10ad, 0x10ae, 0x10af, 0x10b0,
-	0x10b1, 0x10b2, 0x10b3, 0x10b4, 0x10b5, 0x10b6, 0x10b7, 0x10b8,
-	0x10b9, 0x10ba, 0x10bb, 0x10bc, 0x10bd, 0x10be, 0x10bf, 0x10c0,
-	0x10c1, 0x10c2, 0x10c3, 0x10c4, 0x10c5, 0xffff, 0xd21b, 0xff21,
-	0xff22, 0xff23, 0xff24, 0xff25, 0xff26, 0xff27, 0xff28, 0xff29,
-	0xff2a, 0xff2b, 0xff2c, 0xff2d, 0xff2e, 0xff2f, 0xff30, 0xff31,
-	0xff32, 0xff33, 0xff34, 0xff35, 0xff36, 0xff37, 0xff38, 0xff39,
-	0xff3a, 0xff5b, 0xff5c, 0xff5d, 0xff5e, 0xff5f, 0xff60, 0xff61,
-	0xff62, 0xff63, 0xff64, 0xff65, 0xff66, 0xff67, 0xff68, 0xff69,
-	0xff6a, 0xff6b, 0xff6c, 0xff6d, 0xff6e, 0xff6f, 0xff70, 0xff71,
-	0xff72, 0xff73, 0xff74, 0xff75, 0xff76, 0xff77, 0xff78, 0xff79,
-	0xff7a, 0xff7b, 0xff7c, 0xff7d, 0xff7e, 0xff7f, 0xff80, 0xff81,
-	0xff82, 0xff83, 0xff84, 0xff85, 0xff86, 0xff87, 0xff88, 0xff89,
-	0xff8a, 0xff8b, 0xff8c, 0xff8d, 0xff8e, 0xff8f, 0xff90, 0xff91,
-	0xff92, 0xff93, 0xff94, 0xff95, 0xff96, 0xff97, 0xff98, 0xff99,
-	0xff9a, 0xff9b, 0xff9c, 0xff9d, 0xff9e, 0xff9f, 0xffa0, 0xffa1,
-	0xffa2, 0xffa3, 0xffa4, 0xffa5, 0xffa6, 0xffa7, 0xffa8, 0xffa9,
-	0xffaa, 0xffab, 0xffac, 0xffad, 0xffae, 0xffaf, 0xffb0, 0xffb1,
-	0xffb2, 0xffb3, 0xffb4, 0xffb5, 0xffb6, 0xffb7, 0xffb8, 0xffb9,
-	0xffba, 0xffbb, 0xffbc, 0xffbd, 0xffbe, 0xffbf, 0xffc0, 0xffc1,
-	0xffc2, 0xffc3, 0xffc4, 0xffc5, 0xffc6, 0xffc7, 0xffc8, 0xffc9,
-	0xffca, 0xffcb, 0xffcc, 0xffcd, 0xffce, 0xffcf, 0xffd0, 0xffd1,
-	0xffd2, 0xffd3, 0xffd4, 0xffd5, 0xffd6, 0xffd7, 0xffd8, 0xffd9,
-	0xffda, 0xffdb, 0xffdc, 0xffdd, 0xffde, 0xffdf, 0xffe0, 0xffe1,
-	0xffe2, 0xffe3, 0xffe4, 0xffe5, 0xffe6, 0xffe7, 0xffe8, 0xffe9,
-	0xffea, 0xffeb, 0xffec, 0xffed, 0xffee, 0xffef, 0xfff0, 0xfff1,
-	0xfff2, 0xfff3, 0xfff4, 0xfff5, 0xfff6, 0xfff7, 0xfff8, 0xfff9,
-	0xfffa, 0xfffb, 0xfffc, 0xfffd, 0xfffe, 0xffff,
+const struct exfat_upcase_range_info exfat_def_utbl_ri[EXFAT_DEF_UTBL_RI_COUNT] = {
+	/* ASCII */
+	{
+		/* (index = 0, len = 26) */
+		.start = 0x0061,
+		.end   = 0x007B,
+		.value = 0x0041,
+		.inc   = 0x0001,
+	},
+	/* Latin-1 Supplement */
+	{
+		/* (index = 1, len = 23) */
+		.start = 0x00E0,
+		.end   = 0x00F7,
+		.value = 0x00C0,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 2, len = 7) */
+		.start = 0x00F8,
+		.end   = 0x00FF,
+		.value = 0x00D8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 3, len = 1) */
+		.start = 0x00FF,
+		.end   = 0x0100,
+		.value = 0x0178,
+		.inc   = 0x0001,
+	},
+	/* Latin Extended-A */
+	{
+		/* (index = 4, len = 47) */
+		.start = 0x0101,
+		.end   = 0x0130,
+		.value = 0x0100,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 5, len = 5) */
+		.start = 0x0133,
+		.end   = 0x0138,
+		.value = 0x0132,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 6, len = 15) */
+		.start = 0x013A,
+		.end   = 0x0149,
+		.value = 0x0139,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 7, len = 45) */
+		.start = 0x014B,
+		.end   = 0x0178,
+		.value = 0x014A,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 8, len = 6) */
+		.start = 0x017A,
+		.end   = 0x0180,
+		.value = 0x0179,
+		.inc   = 0x0002,
+	},
+	/* Latin Extended-B */
+	{
+		/* (index = 9, len = 1) */
+		.start = 0x0180,
+		.end   = 0x0181,
+		.value = 0x0243,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 10, len = 3) */
+		.start = 0x0183,
+		.end   = 0x0186,
+		.value = 0x0182,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 11, len = 5) */
+		.start = 0x0188,
+		.end   = 0x018D,
+		.value = 0x0187,
+		.inc   = 0x0004,
+	},
+	{
+		/* (index = 12, len = 1) */
+		.start = 0x0192,
+		.end   = 0x0193,
+		.value = 0x0191,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 13, len = 1) */
+		.start = 0x0195,
+		.end   = 0x0196,
+		.value = 0x01F6,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 14, len = 1) */
+		.start = 0x0199,
+		.end   = 0x019A,
+		.value = 0x0198,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 15, len = 1) */
+		.start = 0x019A,
+		.end   = 0x019B,
+		.value = 0x023D,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 16, len = 1) */
+		.start = 0x019E,
+		.end   = 0x019F,
+		.value = 0x0220,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 17, len = 5) */
+		.start = 0x01A1,
+		.end   = 0x01A6,
+		.value = 0x01A0,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 18, len = 8) */
+		.start = 0x01A8,
+		.end   = 0x01B0,
+		.value = 0x01A7,
+		.inc   = 0x0005,
+	},
+	{
+		/* (index = 19, len = 6) */
+		.start = 0x01B0,
+		.end   = 0x01B6,
+		.value = 0x01AF,
+		.inc   = 0x0004,
+	},
+	{
+		/* (index = 20, len = 4) */
+		.start = 0x01B6,
+		.end   = 0x01BA,
+		.value = 0x01B5,
+		.inc   = 0x0003,
+	},
+	{
+		/* (index = 21, len = 1) */
+		.start = 0x01BD,
+		.end   = 0x01BE,
+		.value = 0x01BC,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 22, len = 1) */
+		.start = 0x01BF,
+		.end   = 0x01C0,
+		.value = 0x01F7,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 23, len = 8) */
+		.start = 0x01C6,
+		.end   = 0x01CE,
+		.value = 0x01C4,
+		.inc   = 0x0003,
+	},
+	{
+		/* (index = 24, len = 15) */
+		.start = 0x01CE,
+		.end   = 0x01DD,
+		.value = 0x01CD,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 25, len = 1) */
+		.start = 0x01DD,
+		.end   = 0x01DE,
+		.value = 0x018E,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 26, len = 17) */
+		.start = 0x01DF,
+		.end   = 0x01F0,
+		.value = 0x01DE,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 27, len = 1) */
+		.start = 0x01F3,
+		.end   = 0x01F4,
+		.value = 0x01F1,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 28, len = 6) */
+		.start = 0x01F5,
+		.end   = 0x01FB,
+		.value = 0x01F4,
+		.inc   = 0x0004,
+	},
+	{
+		/* (index = 29, len = 37) */
+		.start = 0x01FB,
+		.end   = 0x0220,
+		.value = 0x01FA,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 30, len = 17) */
+		.start = 0x0223,
+		.end   = 0x0234,
+		.value = 0x0222,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 31, len = 1) */
+		.start = 0x023A,
+		.end   = 0x023B,
+		.value = 0x2C65,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 32, len = 1) */
+		.start = 0x023C,
+		.end   = 0x023D,
+		.value = 0x023B,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 33, len = 1) */
+		.start = 0x023E,
+		.end   = 0x023F,
+		.value = 0x2C66,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 34, len = 7) */
+		.start = 0x0242,
+		.end   = 0x0249,
+		.value = 0x0241,
+		.inc   = 0x0005,
+	},
+	{
+		/* (index = 35, len = 7) */
+		.start = 0x0249,
+		.end   = 0x0250,
+		.value = 0x0248,
+		.inc   = 0x0002,
+	},
+	/* IPA Extensions */
+	{
+		/* (index = 36, len = 1) */
+		.start = 0x0253,
+		.end   = 0x0254,
+		.value = 0x0181,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 37, len = 1) */
+		.start = 0x0254,
+		.end   = 0x0255,
+		.value = 0x0186,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 38, len = 2) */
+		.start = 0x0256,
+		.end   = 0x0258,
+		.value = 0x0189,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 39, len = 1) */
+		.start = 0x0259,
+		.end   = 0x025A,
+		.value = 0x018F,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 40, len = 1) */
+		.start = 0x025B,
+		.end   = 0x025C,
+		.value = 0x0190,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 41, len = 1) */
+		.start = 0x0260,
+		.end   = 0x0261,
+		.value = 0x0193,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 42, len = 1) */
+		.start = 0x0263,
+		.end   = 0x0264,
+		.value = 0x0194,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 43, len = 1) */
+		.start = 0x0268,
+		.end   = 0x0269,
+		.value = 0x0197,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 44, len = 1) */
+		.start = 0x0269,
+		.end   = 0x026A,
+		.value = 0x0196,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 45, len = 1) */
+		.start = 0x026B,
+		.end   = 0x026C,
+		.value = 0x2C62,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 46, len = 1) */
+		.start = 0x026F,
+		.end   = 0x0270,
+		.value = 0x019C,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 47, len = 1) */
+		.start = 0x0272,
+		.end   = 0x0273,
+		.value = 0x019D,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 48, len = 1) */
+		.start = 0x0275,
+		.end   = 0x0276,
+		.value = 0x019F,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 49, len = 1) */
+		.start = 0x027D,
+		.end   = 0x027E,
+		.value = 0x2C64,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 50, len = 4) */
+		.start = 0x0280,
+		.end   = 0x0284,
+		.value = 0x01A6,
+		.inc   = 0x0003,
+	},
+	{
+		/* (index = 51, len = 1) */
+		.start = 0x0288,
+		.end   = 0x0289,
+		.value = 0x01AE,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 52, len = 1) */
+		.start = 0x0289,
+		.end   = 0x028A,
+		.value = 0x0244,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 53, len = 2) */
+		.start = 0x028A,
+		.end   = 0x028C,
+		.value = 0x01B1,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 54, len = 1) */
+		.start = 0x028C,
+		.end   = 0x028D,
+		.value = 0x0245,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 55, len = 1) */
+		.start = 0x0292,
+		.end   = 0x0293,
+		.value = 0x01B7,
+		.inc   = 0x0001,
+	},
+	/* Greek and Coptic */
+	{
+		/* (index = 56, len = 3) */
+		.start = 0x037B,
+		.end   = 0x037E,
+		.value = 0x03FD,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 57, len = 1) */
+		.start = 0x03AC,
+		.end   = 0x03AD,
+		.value = 0x0386,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 58, len = 3) */
+		.start = 0x03AD,
+		.end   = 0x03B0,
+		.value = 0x0388,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 59, len = 17) */
+		.start = 0x03B1,
+		.end   = 0x03C2,
+		.value = 0x0391,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 60, len = 1) */
+		.start = 0x03C2,
+		.end   = 0x03C3,
+		.value = 0x03A3,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 61, len = 9) */
+		.start = 0x03C3,
+		.end   = 0x03CC,
+		.value = 0x03A3,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 62, len = 1) */
+		.start = 0x03CC,
+		.end   = 0x03CD,
+		.value = 0x038C,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 63, len = 2) */
+		.start = 0x03CD,
+		.end   = 0x03CF,
+		.value = 0x038E,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 64, len = 23) */
+		.start = 0x03D9,
+		.end   = 0x03F0,
+		.value = 0x03D8,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 65, len = 1) */
+		.start = 0x03F2,
+		.end   = 0x03F3,
+		.value = 0x03F9,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 66, len = 4) */
+		.start = 0x03F8,
+		.end   = 0x03FC,
+		.value = 0x03F7,
+		.inc   = 0x0003,
+	},
+	/* Cyrillic */
+	{
+		/* (index = 67, len = 32) */
+		.start = 0x0430,
+		.end   = 0x0450,
+		.value = 0x0410,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 68, len = 16) */
+		.start = 0x0450,
+		.end   = 0x0460,
+		.value = 0x0400,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 69, len = 33) */
+		.start = 0x0461,
+		.end   = 0x0482,
+		.value = 0x0460,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 70, len = 53) */
+		.start = 0x048B,
+		.end   = 0x04C0,
+		.value = 0x048A,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 71, len = 13) */
+		.start = 0x04C2,
+		.end   = 0x04CF,
+		.value = 0x04C1,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 72, len = 1) */
+		.start = 0x04CF,
+		.end   = 0x04D0,
+		.value = 0x04C0,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 73, len = 67) */
+		.start = 0x04D1,
+		.end   = 0x0514,
+		.value = 0x04D0,
+		.inc   = 0x0002,
+	},
+	/* Armenian */
+	{
+		/* (index = 74, len = 38) */
+		.start = 0x0561,
+		.end   = 0x0587,
+		.value = 0x0531,
+		.inc   = 0x0001,
+	},
+	/* Phonetic Extensions (LATIN SMALL LETTER P WITH STROKE) */
+	{
+		/* (index = 75, len = 1) */
+		.start = 0x1D7D,
+		.end   = 0x1D7E,
+		.value = 0x2C63,
+		.inc   = 0x0001,
+	},
+	/* Latin Extended Additional */
+	{
+		/* (index = 76, len = 149) */
+		.start = 0x1E01,
+		.end   = 0x1E96,
+		.value = 0x1E00,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 77, len = 89) */
+		.start = 0x1EA1,
+		.end   = 0x1EFA,
+		.value = 0x1EA0,
+		.inc   = 0x0002,
+	},
+	/* Greek Extended */
+	{
+		/* (index = 78, len = 8) */
+		.start = 0x1F00,
+		.end   = 0x1F08,
+		.value = 0x1F08,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 79, len = 6) */
+		.start = 0x1F10,
+		.end   = 0x1F16,
+		.value = 0x1F18,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 80, len = 8) */
+		.start = 0x1F20,
+		.end   = 0x1F28,
+		.value = 0x1F28,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 81, len = 8) */
+		.start = 0x1F30,
+		.end   = 0x1F38,
+		.value = 0x1F38,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 82, len = 6) */
+		.start = 0x1F40,
+		.end   = 0x1F46,
+		.value = 0x1F48,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 83, len = 7) */
+		.start = 0x1F51,
+		.end   = 0x1F58,
+		.value = 0x1F59,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 84, len = 8) */
+		.start = 0x1F60,
+		.end   = 0x1F68,
+		.value = 0x1F68,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 85, len = 2) */
+		.start = 0x1F70,
+		.end   = 0x1F72,
+		.value = 0x1FBA,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 86, len = 4) */
+		.start = 0x1F72,
+		.end   = 0x1F76,
+		.value = 0x1FC8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 87, len = 2) */
+		.start = 0x1F76,
+		.end   = 0x1F78,
+		.value = 0x1FDA,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 88, len = 2) */
+		.start = 0x1F78,
+		.end   = 0x1F7A,
+		.value = 0x1FF8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 89, len = 2) */
+		.start = 0x1F7A,
+		.end   = 0x1F7C,
+		.value = 0x1FEA,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 90, len = 2) */
+		.start = 0x1F7C,
+		.end   = 0x1F7E,
+		.value = 0x1FFA,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 91, len = 8) */
+		.start = 0x1F80,
+		.end   = 0x1F88,
+		.value = 0x1F88,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 92, len = 8) */
+		.start = 0x1F90,
+		.end   = 0x1F98,
+		.value = 0x1F98,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 93, len = 8) */
+		.start = 0x1FA0,
+		.end   = 0x1FA8,
+		.value = 0x1FA8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 94, len = 2) */
+		.start = 0x1FB0,
+		.end   = 0x1FB2,
+		.value = 0x1FB8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 95, len = 1) */
+		.start = 0x1FB3,
+		.end   = 0x1FB4,
+		.value = 0x1FBC,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 96, len = 1) */
+		.start = 0x1FCC,
+		.end   = 0x1FCD,
+		.value = 0x1FC3,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 97, len = 2) */
+		.start = 0x1FD0,
+		.end   = 0x1FD2,
+		.value = 0x1FD8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 98, len = 2) */
+		.start = 0x1FE0,
+		.end   = 0x1FE2,
+		.value = 0x1FE8,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 99, len = 1) */
+		.start = 0x1FE5,
+		.end   = 0x1FE6,
+		.value = 0x1FEC,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 100, len = 1) */
+		.start = 0x1FFC,
+		.end   = 0x1FFD,
+		.value = 0x1FF3,
+		.inc   = 0x0001,
+	},
+	/* Letterlike Symbols (turned letter F) */
+	{
+		/* (index = 101, len = 1) */
+		.start = 0x214E,
+		.end   = 0x214F,
+		.value = 0x2132,
+		.inc   = 0x0001,
+	},
+	/* Number Forms */
+	{
+		/* (index = 102, len = 16) */
+		.start = 0x2170,
+		.end   = 0x2180,
+		.value = 0x2160,
+		.inc   = 0x0001,
+	},
+	{
+		/* (index = 103, len = 1) */
+		.start = 0x2184,
+		.end   = 0x2185,
+		.value = 0x2183,
+		.inc   = 0x0001,
+	},
+	/* Enclosed Alphanumerics */
+	{
+		/* (index = 104, len = 26) */
+		.start = 0x24D0,
+		.end   = 0x24EA,
+		.value = 0x24B6,
+		.inc   = 0x0001,
+	},
+	/* Glagolitic */
+	{
+		/* (index = 105, len = 47) */
+		.start = 0x2C30,
+		.end   = 0x2C5F,
+		.value = 0x2C00,
+		.inc   = 0x0001,
+	},
+	/* Latin Extended-C */
+	{
+		/* (index = 106, len = 9) */
+		.start = 0x2C61,
+		.end   = 0x2C6A,
+		.value = 0x2C60,
+		.inc   = 0x0007,
+	},
+	{
+		/* (index = 107, len = 3) */
+		.start = 0x2C6A,
+		.end   = 0x2C6D,
+		.value = 0x2C69,
+		.inc   = 0x0002,
+	},
+	{
+		/* (index = 108, len = 13) */
+		.start = 0x2C76,
+		.end   = 0x2C83,
+		.value = 0x2C75,
+		.inc   = 0x000B,
+	},
+	/* Coptic */
+	{
+		/* (index = 109, len = 97) */
+		.start = 0x2C83,
+		.end   = 0x2CE4,
+		.value = 0x2C82,
+		.inc   = 0x0002,
+	},
+	/* Georgian Supplement */
+	{
+		/* (index = 110, len = 38) */
+		.start = 0x2D00,
+		.end   = 0x2D26,
+		.value = 0x10A0,
+		.inc   = 0x0001,
+	},
+	/* Halfwidth and Fullwidth Forms */
+	{
+		/* (index = 111, len = 26) */
+		.start = 0xFF41,
+		.end   = 0xFF5B,
+		.value = 0xFF21,
+		.inc   = 0x0001,
+	},
 };
 
 /*
diff --git a/fs/exfat/upcase.c b/fs/exfat/upcase.c
new file mode 100644
index 000000000000..246f76b0f181
--- /dev/null
+++ b/fs/exfat/upcase.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <linux/buffer_head.h>
+
+#include "exfat_raw.h"
+#include "exfat_fs.h"
+
+int exfat_set_upcase_ptable(struct exfat_upcase_ptable *ptbl,
+		const __u16 index, const __u16 value)
+{
+	const size_t page_idx = index / EXFAT_UPTBL_PAGESIZE;
+	const size_t idx_in_page = index % EXFAT_UPTBL_PAGESIZE;
+
+	if (value == 0)
+		return 0;
+
+	if (ptbl->pages[page_idx] == NULL) {
+		void *nm = kvcalloc(EXFAT_UPTBL_PAGESIZE, sizeof(__u16), GFP_KERNEL);
+
+		if (nm == NULL)
+			return -ENOMEM;
+		ptbl->pages[page_idx] = nm;
+		ptbl->cnt++;
+	}
+
+	ptbl->pages[page_idx][idx_in_page] = value;
+
+	return 0;
+}
+
+void exfat_free_upcase_ptable(struct exfat_upcase_ptable *ptbl)
+{
+	if (ptbl == NULL)
+		return;
+
+	for (size_t i = 0; i < ARRAY_SIZE(ptbl->pages); i++) {
+		kvfree(ptbl->pages[i]);
+		ptbl->pages[i] = NULL;
+	}
+	ptbl->cnt = 0;
+}
+
+int exfat_populate_upcase_ptable(struct exfat_upcase_ptable *ptbl,
+		const struct exfat_upcase_range_info *ri,
+		const size_t cnt)
+{
+	int err;
+
+	for (size_t i = 0; i < cnt; i++) {
+		/* Memory safety: allow the value to wrap around but not the index */
+		const unsigned int step = ri[i].inc;
+		unsigned int index = ri[i].start;
+		__u16 value = ri[i].value;
+
+		if (step == 0 || index >= ri[i].end)
+			/* Damaged .rodata */
+			return -EINVAL;
+
+		while (index < ri[i].end) {
+			err = exfat_set_upcase_ptable(ptbl, index, value);
+			if (err)
+				return err;
+
+			index += step;
+			value += step;
+		}
+	}
+
+	return 0;
+}
-- 
2.53.0.1.ga224b40d3f.dirty