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1a59d1b8 | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) International Business Machines Corp., 2000-2004 | |
1da177e4 LT |
4 | */ |
5 | ||
6 | #include <linux/fs.h> | |
7 | #include <linux/slab.h> | |
8 | #include "jfs_incore.h" | |
9 | #include "jfs_filsys.h" | |
10 | #include "jfs_unicode.h" | |
11 | #include "jfs_debug.h" | |
12 | ||
13 | /* | |
14 | * NAME: jfs_strfromUCS() | |
15 | * | |
16 | * FUNCTION: Convert little-endian unicode string to character string | |
17 | * | |
18 | */ | |
19 | int jfs_strfromUCS_le(char *to, const __le16 * from, | |
20 | int len, struct nls_table *codepage) | |
21 | { | |
22 | int i; | |
23 | int outlen = 0; | |
24 | static int warn_again = 5; /* Only warn up to 5 times total */ | |
25 | int warn = !!warn_again; /* once per string */ | |
26 | ||
27 | if (codepage) { | |
28 | for (i = 0; (i < len) && from[i]; i++) { | |
29 | int charlen; | |
30 | charlen = | |
31 | codepage->uni2char(le16_to_cpu(from[i]), | |
32 | &to[outlen], | |
33 | NLS_MAX_CHARSET_SIZE); | |
34 | if (charlen > 0) | |
35 | outlen += charlen; | |
36 | else | |
37 | to[outlen++] = '?'; | |
38 | } | |
39 | } else { | |
40 | for (i = 0; (i < len) && from[i]; i++) { | |
f5f28773 SR |
41 | if (unlikely(le16_to_cpu(from[i]) & 0xff00)) { |
42 | to[i] = '?'; | |
43 | if (unlikely(warn)) { | |
1da177e4 LT |
44 | warn--; |
45 | warn_again--; | |
46 | printk(KERN_ERR | |
63f83c9f DK |
47 | "non-latin1 character 0x%x found in JFS file name\n", |
48 | le16_to_cpu(from[i])); | |
1da177e4 LT |
49 | printk(KERN_ERR |
50 | "mount with iocharset=utf8 to access\n"); | |
51 | } | |
f5f28773 | 52 | |
1da177e4 LT |
53 | } |
54 | else | |
55 | to[i] = (char) (le16_to_cpu(from[i])); | |
56 | } | |
57 | outlen = i; | |
58 | } | |
59 | to[outlen] = 0; | |
60 | return outlen; | |
61 | } | |
62 | ||
63 | /* | |
64 | * NAME: jfs_strtoUCS() | |
65 | * | |
66 | * FUNCTION: Convert character string to unicode string | |
67 | * | |
68 | */ | |
69 | static int jfs_strtoUCS(wchar_t * to, const unsigned char *from, int len, | |
70 | struct nls_table *codepage) | |
71 | { | |
72 | int charlen; | |
73 | int i; | |
74 | ||
75 | if (codepage) { | |
76 | for (i = 0; len && *from; i++, from += charlen, len -= charlen) | |
77 | { | |
78 | charlen = codepage->char2uni(from, len, &to[i]); | |
79 | if (charlen < 1) { | |
80 | jfs_err("jfs_strtoUCS: char2uni returned %d.", | |
81 | charlen); | |
82 | jfs_err("charset = %s, char = 0x%x", | |
83 | codepage->charset, *from); | |
84 | return charlen; | |
85 | } | |
86 | } | |
87 | } else { | |
88 | for (i = 0; (i < len) && from[i]; i++) | |
89 | to[i] = (wchar_t) from[i]; | |
90 | } | |
91 | ||
92 | to[i] = 0; | |
93 | return i; | |
94 | } | |
95 | ||
96 | /* | |
97 | * NAME: get_UCSname() | |
98 | * | |
99 | * FUNCTION: Allocate and translate to unicode string | |
100 | * | |
101 | */ | |
102 | int get_UCSname(struct component_name * uniName, struct dentry *dentry) | |
103 | { | |
104 | struct nls_table *nls_tab = JFS_SBI(dentry->d_sb)->nls_tab; | |
105 | int length = dentry->d_name.len; | |
106 | ||
107 | if (length > JFS_NAME_MAX) | |
108 | return -ENAMETOOLONG; | |
109 | ||
110 | uniName->name = | |
6da2ec56 | 111 | kmalloc_array(length + 1, sizeof(wchar_t), GFP_NOFS); |
1da177e4 LT |
112 | |
113 | if (uniName->name == NULL) | |
087387f9 | 114 | return -ENOMEM; |
1da177e4 LT |
115 | |
116 | uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name, | |
117 | length, nls_tab); | |
118 | ||
119 | if (uniName->namlen < 0) { | |
120 | kfree(uniName->name); | |
121 | return uniName->namlen; | |
122 | } | |
123 | ||
124 | return 0; | |
125 | } |