diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-30 09:22:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-30 09:22:00 -0700 |
| commit | 034dd340b08be1f2f0477ad16131d609f9dbd53c (patch) | |
| tree | 2536f4b2d7893ccd916b5abdf3c454ad6edc03c2 /fs/exfat/nls.c | |
| download | linux-stable-034dd340b08be1f2f0477ad16131d609f9dbd53c.tar.gz linux-stable-034dd340b08be1f2f0477ad16131d609f9dbd53c.zip | |
Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted
Pull tracing fixes from Steven Rostedt:
- Fix error output of boot instance creation failure
Currently if a boot instance creation fails, instead of printing out
the name of the instance that failed, it prints "(null)". That is
because it prints "cur_str" that had already been processed by
strsep(). Print the saved name instead.
While at it, print the error code of the failure.
- Fix use-after-free for same named historgrams
Histograms can be named so that they can be used in multiple events.
But if the named histogram has a variable attached, the second event
that uses the named histogram which duplicates it and needs to free
the original after duplication leaves the old variable in place and
still visible. If another histogram uses than variable, it will use
the stale one which will try to reference the freed duplicate
histogram and crash the kernel.
Free the duplicate variables along with the duplicated histogram
data.
- Check return value of kthread_run() in event self test
The events self tests uses a kthread for testing but does not check
if it succeeded in creating a kthread. If the kthread creation were
to fail, the code will still try to call kthread_stop() on the error
returned.
- Fix race between reading trace_pipe and updating subbuffer size
If a user is reading the trace_pipe file at the same time they update
the ring buffer sub-buffer size, can cause the trace_pipe read to
read stale data. Add trace_access_lock() around updating the ring
buffer sub-buffer size.
- Fix eventfs_inode on failure path in creation of the events directory
In the creation of the "events" directory, if after allocating the
eventfs_inode a failure is detected, it calls cleanup_ei() which
calls free_ei(). The free_ei() will test if eventfs_inode being freed
has no children. It is a bug if it does. But on the failure case of
the creation of the "events" directory, the children lists have not
yet been initialized and the free will trigger a warning because
list_empty() on an uninitialized list returns false.
Move the initialization into init_ei() where it makes more sense and
makes sure that a created eventfs_inode has its lists initialized
upon creation.
- Check return value of kthread_run() in ftrace direct sample code
The sample code that shows how to use the ftrace direct calls does
not test the return of kthread_run() to see if it succeeds. Return a
failure if the kthread_run() doesn't succeed.
- Clear user events state on fork in case of alloc failure
On fork, the child gets a pointer to the parent's user events state.
It makes a copy of it then updates the child's pointer to it. But if
the allocation fails, the duplication function leaves the child with
a pointer to its parent's descriptor. When the child cleans up its
data, it will free the parent's descriptor while the parent is still
using it.
In the duplication function, set the child's user_event_mm to NULL
before testing if the allocation succeeded, and when it exits it will
not free the parent's descriptor.
- Fix retry exhaustion in simple ring buffer reader swap
simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
post-decrements it only after a failed link replacement. On the final
attempt, a successful replacement leaves retry at zero, while a
failed replacement leaves it at -1.
But the check for success expects the retry value to be non-zero and
exits with an error on zero. This is the opposite result. Fix it.
- Fail nicely when the remote swap_reader_page() returns an error
Currently, if the swap_reader_page() of a remote buffer fails, it
triggers a WARN_ON_ONCE() and continues normally. Instead, have it
exit with an error and a pr_warn() print instead of a full WARNING.
* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
ring-buffer: Stop remote reader update when page swap fails
tracing: Fix retry exhaustion in simple ring buffer reader swap
tracing/user_events: Clear copied tracing state before fork duplication
samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
eventfs: Initialize ei->children and ei->list in init_ei()
tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
tracing: Fix crash passing ERR_PTR to kthread_stop()
tracing: Fix use-after-free with same-name named triggers
tracing: Fix logged instance name on creation failure
Diffstat (limited to 'fs/exfat/nls.c')
| -rw-r--r-- | fs/exfat/nls.c | 809 |
1 files changed, 809 insertions, 0 deletions
diff --git a/fs/exfat/nls.c b/fs/exfat/nls.c new file mode 100644 index 000000000..055447edc --- /dev/null +++ b/fs/exfat/nls.c @@ -0,0 +1,809 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd. + */ + +#include <linux/string.h> +#include <linux/slab.h> +#include <linux/buffer_head.h> +#include <linux/unaligned.h> + +#include "exfat_raw.h" +#include "exfat_fs.h" + +/* Upcase table macro */ +#define EXFAT_NUM_UPCASE (2918) +#define UTBL_COUNT (0x10000) + +/* + * 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). + */ +static const unsigned short 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, + 0x01a0, 0x01a0, 0x01a2, 0x01a2, 0x01a4, 0x01a4, 0x01a6, 0x01a7, + 0x01a7, 0x01a9, 0x01aa, 0x01ab, 0x01ac, 0x01ac, 0x01ae, 0x01af, + 0x01af, 0x01b1, 0x01b2, 0x01b3, 0x01b3, 0x01b5, 0x01b5, 0x01b7, + 0x01b8, 0x01b8, 0x01ba, 0x01bb, 0x01bc, 0x01bc, 0x01be, 0x01f7, + 0x01c0, 0x01c1, 0x01c2, 0x01c3, 0x01c4, 0x01c5, 0x01c4, 0x01c7, + 0x01c8, 0x01c7, 0x01ca, 0x01cb, 0x01ca, 0x01cd, 0x01cd, 0x01cf, + 0x01cf, 0x01d1, 0x01d1, 0x01d3, 0x01d3, 0x01d5, 0x01d5, 0x01d7, + 0x01d7, 0x01d9, 0x01d9, 0x01db, 0x01db, 0x018e, 0x01de, 0x01de, + 0x01e0, 0x01e0, 0x01e2, 0x01e2, 0x01e4, 0x01e4, 0x01e6, 0x01e6, + 0x01e8, 0x01e8, 0x01ea, 0x01ea, 0x01ec, 0x01ec, 0x01ee, 0x01ee, + 0x01f0, 0x01f1, 0x01f2, 0x01f1, 0x01f4, 0x01f4, 0x01f6, 0x01f7, + 0x01f8, 0x01f8, 0x01fa, 0x01fa, 0x01fc, 0x01fc, 0x01fe, 0x01fe, + 0x0200, 0x0200, 0x0202, 0x0202, 0x0204, 0x0204, 0x0206, 0x0206, + 0x0208, 0x0208, 0x020a, 0x020a, 0x020c, 0x020c, 0x020e, 0x020e, + 0x0210, 0x0210, 0x0212, 0x0212, 0x0214, 0x0214, 0x0216, 0x0216, + 0x0218, 0x0218, 0x021a, 0x021a, 0x021c, 0x021c, 0x021e, 0x021e, + 0x0220, 0x0221, 0x0222, 0x0222, 0x0224, 0x0224, 0x0226, 0x0226, + 0x0228, 0x0228, 0x022a, 0x022a, 0x022c, 0x022c, 0x022e, 0x022e, + 0x0230, 0x0230, 0x0232, 0x0232, 0x0234, 0x0235, 0x0236, 0x0237, + 0x0238, 0x0239, 0x2c65, 0x023b, 0x023b, 0x023d, 0x2c66, 0x023f, + 0x0240, 0x0241, 0x0241, 0x0243, 0x0244, 0x0245, 0x0246, 0x0246, + 0x0248, 0x0248, 0x024a, 0x024a, 0x024c, 0x024c, 0x024e, 0x024e, + 0x0250, 0x0251, 0x0252, 0x0181, 0x0186, 0x0255, 0x0189, 0x018a, + 0x0258, 0x018f, 0x025a, 0x0190, 0x025c, 0x025d, 0x025e, 0x025f, + 0x0193, 0x0261, 0x0262, 0x0194, 0x0264, 0x0265, 0x0266, 0x0267, + 0x0197, 0x0196, 0x026a, 0x2c62, 0x026c, 0x026d, 0x026e, 0x019c, + 0x0270, 0x0271, 0x019d, 0x0273, 0x0274, 0x019f, 0x0276, 0x0277, + 0x0278, 0x0279, 0x027a, 0x027b, 0x027c, 0x2c64, 0x027e, 0x027f, + 0x01a6, 0x0281, 0x0282, 0x01a9, 0x0284, 0x0285, 0x0286, 0x0287, + 0x01ae, 0x0244, 0x01b1, 0x01b2, 0x0245, 0x028d, 0x028e, 0x028f, + 0x0290, 0x0291, 0x01b7, 0x0293, 0x0294, 0x0295, 0x0296, 0x0297, + 0x0298, 0x0299, 0x029a, 0x029b, 0x029c, 0x029d, 0x029e, 0x029f, + 0x02a0, 0x02a1, 0x02a2, 0x02a3, 0x02a4, 0x02a5, 0x02a6, 0x02a7, + 0x02a8, 0x02a9, 0x02aa, 0x02ab, 0x02ac, 0x02ad, 0x02ae, 0x02af, + 0x02b0, 0x02b1, 0x02b2, 0x02b3, 0x02b4, 0x02b5, 0x02b6, 0x02b7, + 0x02b8, 0x02b9, 0x02ba, 0x02bb, 0x02bc, 0x02bd, 0x02be, 0x02bf, + 0x02c0, 0x02c1, 0x02c2, 0x02c3, 0x02c4, 0x02c5, 0x02c6, 0x02c7, + 0x02c8, 0x02c9, 0x02ca, 0x02cb, 0x02cc, 0x02cd, 0x02ce, 0x02cf, + 0x02d0, 0x02d1, 0x02d2, 0x02d3, 0x02d4, 0x02d5, 0x02d6, 0x02d7, + 0x02d8, 0x02d9, 0x02da, 0x02db, 0x02dc, 0x02dd, 0x02de, 0x02df, + 0x02e0, 0x02e1, 0x02e2, 0x02e3, 0x02e4, 0x02e5, 0x02e6, 0x02e7, + 0x02e8, 0x02e9, 0x02ea, 0x02eb, 0x02ec, 0x02ed, 0x02ee, 0x02ef, + 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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, +}; + +/* + * Allow full-width illegal characters : + * "MS windows 7" supports full-width-invalid-name-characters. + * So we should check half-width-invalid-name-characters(ASCII) only + * for compatibility. + * + * " * / : < > ? \ | + */ +static unsigned short bad_uni_chars[] = { + 0x0022, 0x002A, 0x002F, 0x003A, + 0x003C, 0x003E, 0x003F, 0x005C, 0x007C, + 0 +}; + +static int exfat_convert_char_to_ucs2(struct nls_table *nls, + const unsigned char *ch, int ch_len, unsigned short *ucs2, + int *lossy) +{ + int len; + + *ucs2 = 0x0; + + if (ch[0] < 0x80) { + *ucs2 = ch[0]; + return 1; + } + + len = nls->char2uni(ch, ch_len, ucs2); + if (len < 0) { + /* conversion failed */ + if (lossy != NULL) + *lossy |= NLS_NAME_LOSSY; + *ucs2 = '_'; + return 1; + } + return len; +} + +static int exfat_convert_ucs2_to_char(struct nls_table *nls, + unsigned short ucs2, unsigned char *ch, int *lossy) +{ + int len; + + ch[0] = 0x0; + + if (ucs2 < 0x0080) { + ch[0] = ucs2; + return 1; + } + + len = nls->uni2char(ucs2, ch, MAX_CHARSET_SIZE); + if (len < 0) { + /* conversion failed */ + if (lossy != NULL) + *lossy |= NLS_NAME_LOSSY; + ch[0] = '_'; + return 1; + } + return len; +} + +unsigned short exfat_toupper(struct super_block *sb, unsigned short a) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + + return sbi->vol_utbl[a] ? sbi->vol_utbl[a] : a; +} + +static unsigned short *exfat_wstrchr(unsigned short *str, unsigned short wchar) +{ + while (*str) { + if (*(str++) == wchar) + return str; + } + return NULL; +} + +int exfat_uniname_ncmp(struct super_block *sb, unsigned short *a, + unsigned short *b, unsigned int len) +{ + int i; + + for (i = 0; i < len; i++, a++, b++) + if (exfat_toupper(sb, *a) != exfat_toupper(sb, *b)) + return 1; + return 0; +} + +static int exfat_utf16_to_utf8(struct super_block *sb, + struct exfat_uni_name *p_uniname, unsigned char *p_cstring, + int buflen) +{ + int len; + const unsigned short *uniname = p_uniname->name; + + /* always len >= 0 */ + len = utf16s_to_utf8s(uniname, MAX_NAME_LENGTH, UTF16_HOST_ENDIAN, + p_cstring, buflen); + p_cstring[len] = '\0'; + return len; +} + +static int exfat_utf8_to_utf16(struct super_block *sb, + const unsigned char *p_cstring, const int len, + struct exfat_uni_name *p_uniname, int *p_lossy) +{ + int i, unilen, lossy = NLS_NAME_NO_LOSSY; + __le16 upname[MAX_NAME_LENGTH + 1]; + unsigned short *uniname = p_uniname->name; + + WARN_ON(!len); + + unilen = utf8s_to_utf16s(p_cstring, len, UTF16_HOST_ENDIAN, + (wchar_t *)uniname, MAX_NAME_LENGTH + 2); + if (unilen < 0) { + exfat_err(sb, "failed to %s (err : %d) nls len : %d", + __func__, unilen, len); + return unilen; + } + + if (unilen > MAX_NAME_LENGTH) { + exfat_debug(sb, "failed to %s (estr:ENAMETOOLONG) nls len : %d, unilen : %d > %d", + __func__, len, unilen, MAX_NAME_LENGTH); + return -ENAMETOOLONG; + } + + for (i = 0; i < unilen; i++) { + if (*uniname < 0x0020 || + exfat_wstrchr(bad_uni_chars, *uniname)) + lossy |= NLS_NAME_LOSSY; + + upname[i] = cpu_to_le16(exfat_toupper(sb, *uniname)); + uniname++; + } + + *uniname = '\0'; + p_uniname->name_len = unilen; + p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0, + CS_DEFAULT); + + if (p_lossy) + *p_lossy = lossy; + return unilen; +} + +#define SURROGATE_MASK 0xfffff800 +#define SURROGATE_PAIR 0x0000d800 +#define SURROGATE_LOW 0x00000400 + +static int __exfat_utf16_to_nls(struct super_block *sb, + struct exfat_uni_name *p_uniname, unsigned char *p_cstring, + int buflen) +{ + int i, j, len, out_len = 0; + unsigned char buf[MAX_CHARSET_SIZE]; + const unsigned short *uniname = p_uniname->name; + struct nls_table *nls = EXFAT_SB(sb)->nls_io; + + i = 0; + while (i < MAX_NAME_LENGTH && out_len < (buflen - 1)) { + if (*uniname == '\0') + break; + if ((*uniname & SURROGATE_MASK) != SURROGATE_PAIR) { + len = exfat_convert_ucs2_to_char(nls, *uniname, buf, + NULL); + } else { + /* Process UTF-16 surrogate pair as one character */ + if (!(*uniname & SURROGATE_LOW) && + i+1 < MAX_NAME_LENGTH && + (*(uniname+1) & SURROGATE_MASK) == SURROGATE_PAIR && + (*(uniname+1) & SURROGATE_LOW)) { + uniname++; + i++; + } + + /* + * UTF-16 surrogate pair encodes code points above + * U+FFFF. Code points above U+FFFF are not supported + * by kernel NLS framework therefore use replacement + * character + */ + len = 1; + buf[0] = '_'; + } + + if (out_len + len >= buflen) + len = buflen - 1 - out_len; + out_len += len; + + if (len > 1) { + for (j = 0; j < len; j++) + *p_cstring++ = buf[j]; + } else { /* len == 1 */ + *p_cstring++ = *buf; + } + + uniname++; + i++; + } + + *p_cstring = '\0'; + return out_len; +} + +static int exfat_nls_to_ucs2(struct super_block *sb, + const unsigned char *p_cstring, const int len, + struct exfat_uni_name *p_uniname, int *p_lossy) +{ + int i = 0, unilen = 0, lossy = NLS_NAME_NO_LOSSY; + __le16 upname[MAX_NAME_LENGTH + 1]; + unsigned short *uniname = p_uniname->name; + struct nls_table *nls = EXFAT_SB(sb)->nls_io; + + WARN_ON(!len); + + while (unilen < MAX_NAME_LENGTH && i < len) { + i += exfat_convert_char_to_ucs2(nls, p_cstring + i, len - i, + uniname, &lossy); + + if (*uniname < 0x0020 || + exfat_wstrchr(bad_uni_chars, *uniname)) + lossy |= NLS_NAME_LOSSY; + + upname[unilen] = cpu_to_le16(exfat_toupper(sb, *uniname)); + uniname++; + unilen++; + } + + *uniname = '\0'; + p_uniname->name_len = unilen; + p_uniname->name_hash = exfat_calc_chksum16(upname, unilen << 1, 0, + CS_DEFAULT); + + if (p_lossy) + *p_lossy = lossy; + return unilen; +} + +int exfat_utf16_to_nls(struct super_block *sb, struct exfat_uni_name *uniname, + unsigned char *p_cstring, int buflen) +{ + if (EXFAT_SB(sb)->options.utf8) + return exfat_utf16_to_utf8(sb, uniname, p_cstring, + buflen); + return __exfat_utf16_to_nls(sb, uniname, p_cstring, buflen); +} + +int exfat_nls_to_utf16(struct super_block *sb, const unsigned char *p_cstring, + const int len, struct exfat_uni_name *uniname, int *p_lossy) +{ + if (EXFAT_SB(sb)->options.utf8) + return exfat_utf8_to_utf16(sb, p_cstring, len, + uniname, p_lossy); + return exfat_nls_to_ucs2(sb, p_cstring, len, uniname, p_lossy); +} + +static int exfat_load_upcase_table(struct super_block *sb, + sector_t sector, unsigned long long num_sectors, + unsigned int utbl_checksum) +{ + struct exfat_sb_info *sbi = EXFAT_SB(sb); + unsigned int sect_size = sb->s_blocksize; + unsigned int i, index = 0; + u32 chksum = 0; + unsigned char skip = false; + unsigned short *upcase_table; + + upcase_table = kvcalloc(UTBL_COUNT, sizeof(unsigned short), GFP_KERNEL); + if (!upcase_table) + return -ENOMEM; + + sbi->vol_utbl = upcase_table; + num_sectors += sector; + + while (sector < num_sectors) { + struct buffer_head *bh; + + bh = sb_bread(sb, sector); + if (!bh) { + exfat_err(sb, "failed to read sector(0x%llx)", + (unsigned long long)sector); + return -EIO; + } + sector++; + for (i = 0; i < sect_size && index <= 0xFFFF; i += 2) { + unsigned short uni = get_unaligned_le16(bh->b_data + i); + + if (skip) { + index += uni; + skip = false; + } else if (uni == index) { + index++; + } else if (uni == 0xFFFF) { + skip = true; + } else { /* uni != index , uni != 0xFFFF */ + upcase_table[index] = uni; + index++; + } + } + chksum = exfat_calc_chksum32(bh->b_data, i, chksum, CS_DEFAULT); + brelse(bh); + } + + if (index >= 0xFFFF && utbl_checksum == chksum) + 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(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 = 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; + + /* FATAL error: default upcase table has error */ + return -EIO; +} + +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; + unsigned char blksize_bits = sb->s_blocksize_bits; + struct exfat_chain clu; + struct exfat_dentry *ep; + struct exfat_sb_info *sbi = EXFAT_SB(sb); + struct buffer_head *bh; + + 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++) { + ep = exfat_get_dentry(sb, &clu, i, &bh); + if (!ep) + return -EIO; + + type = exfat_get_entry_type(ep); + if (type == TYPE_UNUSED) { + brelse(bh); + break; + } + + if (type != TYPE_UPCASE) { + brelse(bh); + continue; + } + + tbl_clu = le32_to_cpu(ep->dentry.upcase.start_clu); + tbl_size = le64_to_cpu(ep->dentry.upcase.size); + if (tbl_size) { + sector = exfat_cluster_to_sector(sbi, tbl_clu); + 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 { + 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 */ + return ret; + } + + if (exfat_get_next_cluster(sb, &clu.dir)) + return -EIO; + } + + exfat_fs_error(sb, "no upcase table entry. Please run fsck"); + +load_default: + /* load default upcase table */ + return exfat_load_default_upcase_table(sb); +} + +void exfat_free_upcase_table(struct exfat_sb_info *sbi) +{ + kvfree(sbi->vol_utbl); + sbi->vol_utbl = NULL; +} |
