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Diffstat (limited to 'fs/udf/unicode.c')
-rw-r--r--fs/udf/unicode.c146
1 files changed, 45 insertions, 101 deletions
diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c
index 5599e7535401..dc5990f4c952 100644
--- a/fs/udf/unicode.c
+++ b/fs/udf/unicode.c
@@ -28,53 +28,8 @@
#include "udf_sb.h"
-static int udf_translate_to_linux(uint8_t *, int, uint8_t *, int, uint8_t *,
- int);
-
-static int udf_char_to_ustr(struct ustr *dest, const uint8_t *src, int strlen)
-{
- if ((!dest) || (!src) || (!strlen) || (strlen > UDF_NAME_LEN))
- return 0;
-
- memset(dest, 0, sizeof(struct ustr));
- memcpy(dest->u_name, src, strlen);
- dest->u_cmpID = 0x08;
- dest->u_len = strlen;
-
- return strlen;
-}
-
-/*
- * udf_build_ustr
- */
-int udf_build_ustr(struct ustr *dest, dstring *ptr, int size)
-{
- int usesize;
-
- if (!dest || !ptr || !size)
- return -1;
- BUG_ON(size < 2);
-
- usesize = min_t(size_t, ptr[size - 1], sizeof(dest->u_name));
- usesize = min(usesize, size - 2);
- dest->u_cmpID = ptr[0];
- dest->u_len = usesize;
- memcpy(dest->u_name, ptr + 1, usesize);
- memset(dest->u_name + usesize, 0, sizeof(dest->u_name) - usesize);
-
- return 0;
-}
-
-/*
- * udf_build_ustr_exact
- */
-static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize)
-{
- memset(dest, 0, sizeof(struct ustr));
- dest->u_cmpID = ptr[0];
- dest->u_len = exactsize - 1;
- memcpy(dest->u_name, ptr + 1, exactsize - 1);
-}
+static int udf_translate_to_linux(uint8_t *, int, const uint8_t *, int,
+ const uint8_t *, int);
static int udf_uni2char_utf8(wchar_t uni,
unsigned char *out,
@@ -159,53 +114,50 @@ static int udf_char2uni_utf8(const unsigned char *in,
return u_len;
}
-static int udf_name_from_CS0(struct ustr *utf_o,
- const struct ustr *ocu_i,
+static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
+ const uint8_t *ocu, int ocu_len,
int (*conv_f)(wchar_t, unsigned char *, int))
{
- const uint8_t *ocu;
- uint8_t cmp_id, ocu_len;
+ uint8_t cmp_id;
int i, len;
+ int str_o_len = 0;
+ if (str_max_len <= 0)
+ return 0;
- ocu_len = ocu_i->u_len;
if (ocu_len == 0) {
- memset(utf_o, 0, sizeof(struct ustr));
+ memset(str_o, 0, str_max_len);
return 0;
}
- cmp_id = ocu_i->u_cmpID;
+ cmp_id = ocu[0];
if (cmp_id != 8 && cmp_id != 16) {
- memset(utf_o, 0, sizeof(struct ustr));
- pr_err("unknown compression code (%d) stri=%s\n",
- cmp_id, ocu_i->u_name);
+ memset(str_o, 0, str_max_len);
+ pr_err("unknown compression code (%d) stri=%s\n", cmp_id, ocu);
return -EINVAL;
}
- ocu = ocu_i->u_name;
- utf_o->u_len = 0;
- for (i = 0; (i < ocu_len) && (utf_o->u_len < UDF_NAME_LEN);) {
+ for (i = 1; (i < ocu_len) && (str_o_len < str_max_len);) {
/* Expand OSTA compressed Unicode to Unicode */
uint32_t c = ocu[i++];
if (cmp_id == 16)
c = (c << 8) | ocu[i++];
- len = conv_f(c, &utf_o->u_name[utf_o->u_len],
- UDF_NAME_LEN - utf_o->u_len);
+ len = conv_f(c, &str_o[str_o_len], str_max_len - str_o_len);
/* Valid character? */
if (len >= 0)
- utf_o->u_len += len;
+ str_o_len += len;
else if (len == -ENAMETOOLONG)
break;
else
- utf_o->u_name[utf_o->u_len++] = '?';
+ str_o[str_o_len++] = '?';
}
- utf_o->u_cmpID = 8;
- return utf_o->u_len;
+ return str_o_len;
}
-static int udf_name_to_CS0(dstring *ocu, struct ustr *uni, int length,
+static int udf_name_to_CS0(uint8_t *ocu, int ocu_max_len,
+ const uint8_t *str_i, int str_len,
int (*conv_f)(const unsigned char *, int, wchar_t *))
{
int i, len;
@@ -213,18 +165,21 @@ static int udf_name_to_CS0(dstring *ocu, struct ustr *uni, int length,
wchar_t uni_char;
int u_len, u_ch;
- memset(ocu, 0, sizeof(dstring) * length);
+ if (ocu_max_len <= 0)
+ return 0;
+
+ memset(ocu, 0, ocu_max_len);
ocu[0] = 8;
max_val = 0xff;
u_ch = 1;
try_again:
- u_len = 0;
- for (i = 0; i < uni->u_len; i++) {
+ u_len = 1;
+ for (i = 0; i < str_len; i++) {
/* Name didn't fit? */
- if (u_len + 1 + u_ch >= length)
+ if (u_len + u_ch > ocu_max_len)
return 0;
- len = conv_f(&uni->u_name[i], uni->u_len - i, &uni_char);
+ len = conv_f(&str_i[i], str_len - i, &uni_char);
if (!len)
continue;
/* Invalid character, deal with it */
@@ -241,41 +196,37 @@ try_again:
}
if (max_val == 0xffff)
- ocu[++u_len] = (uint8_t)(uni_char >> 8);
- ocu[++u_len] = (uint8_t)(uni_char & 0xff);
+ ocu[u_len++] = (uint8_t)(uni_char >> 8);
+ ocu[u_len++] = (uint8_t)(uni_char & 0xff);
i += len - 1;
}
- ocu[length - 1] = (uint8_t)u_len + 1;
- return u_len + 1;
+ return u_len;
}
-int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i)
+int udf_CS0toUTF8(uint8_t *utf_o, int o_len, const uint8_t *ocu_i, int i_len)
{
- return udf_name_from_CS0(utf_o, ocu_i, udf_uni2char_utf8);
+ return udf_name_from_CS0(utf_o, o_len, ocu_i, i_len,
+ udf_uni2char_utf8);
}
-int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
+int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
uint8_t *dname, int dlen)
{
- struct ustr *filename, *unifilename;
+ uint8_t *filename;
int (*conv_f)(wchar_t, unsigned char *, int);
int ret;
if (!slen)
return -EIO;
- filename = kmalloc(sizeof(struct ustr), GFP_NOFS);
+ if (dlen <= 0)
+ return 0;
+
+ filename = kmalloc(dlen, GFP_NOFS);
if (!filename)
return -ENOMEM;
- unifilename = kmalloc(sizeof(struct ustr), GFP_NOFS);
- if (!unifilename) {
- ret = -ENOMEM;
- goto out1;
- }
-
- udf_build_ustr_exact(unifilename, sname, slen);
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
conv_f = udf_uni2char_utf8;
} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
@@ -283,21 +234,18 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen,
} else
BUG();
- ret = udf_name_from_CS0(filename, unifilename, conv_f);
+ ret = udf_name_from_CS0(filename, dlen, sname, slen, conv_f);
if (ret < 0) {
udf_debug("Failed in udf_get_filename: sname = %s\n", sname);
goto out2;
}
- ret = udf_translate_to_linux(dname, dlen,
- filename->u_name, filename->u_len,
- unifilename->u_name, unifilename->u_len);
+ ret = udf_translate_to_linux(dname, dlen, filename, dlen,
+ sname + 1, slen - 1);
/* Zero length filename isn't valid... */
if (ret == 0)
ret = -EINVAL;
out2:
- kfree(unifilename);
-out1:
kfree(filename);
return ret;
}
@@ -305,12 +253,8 @@ out1:
int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
uint8_t *dname, int dlen)
{
- struct ustr unifilename;
int (*conv_f)(const unsigned char *, int, wchar_t *);
- if (!udf_char_to_ustr(&unifilename, sname, slen))
- return 0;
-
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
conv_f = udf_char2uni_utf8;
} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
@@ -318,7 +262,7 @@ int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
} else
BUG();
- return udf_name_to_CS0(dname, &unifilename, dlen, conv_f);
+ return udf_name_to_CS0(dname, dlen, sname, slen, conv_f);
}
#define ILLEGAL_CHAR_MARK '_'
@@ -329,8 +273,8 @@ int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
#define CRC_LEN 5
static int udf_translate_to_linux(uint8_t *newName, int newLen,
- uint8_t *udfName, int udfLen,
- uint8_t *fidName, int fidNameLen)
+ const uint8_t *udfName, int udfLen,
+ const uint8_t *fidName, int fidNameLen)
{
int index, newIndex = 0, needsCRC = 0;
int extIndex = 0, newExtIndex = 0, hasExt = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-13 08:40:26 +0000