\n
-----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAlsZTnUACgkQnJ2qBz9k QNmSlwf6AwQFhSrrPTOwL9OIUzPnjvFC/Yk2CRmQzC+6jkFoS+cRPsCwDeGOP9KK 9Col8Dr3M72PLKbyA3Z46YzXsRCB+pifgQKDjpMNKZJxuHSd8JmvAgEuLs8a2119 4ZM0nNwhFJ2fnrpUwBDKoGB7m+Xb+xxnEY4hQ+jFPrDBuXmcjOz41al4EcZeb1YE Eu6zpmB4jIqkOY+LxMtHRSE7GlDAP6g9ERYodjsL/+Vg424wHLRQb/IVaXngalGS es1cMOoIqfT0rsODweXP4aGOY+z+Am+Htspqg7mrWk9zu/lP/57vS9Kwy/VsOQfp zRoDzuMnxumXVjTjHnd1Y9NIJw+gYg== =wZmz -----END PGP SIGNATURE----- Merge tag 'udf_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull udf updates from Jan Kara: "UDF support for UTF-16 characters in file names" * tag 'udf_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: udf: Add support for decoding UTF-16 characters udf: Add support for encoding UTF-16 characters udf: Push sb argument to udf_name_[to|from]_CS0() udf: Convert ident strings to proper charset udf: Use UTF-32 <-> UTF-8 conversion functions from NLS udf: Always require NLS support
This commit is contained in:
commit
d987f62cce
@ -1,6 +1,7 @@
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config UDF_FS
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tristate "UDF file system support"
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select CRC_ITU_T
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select NLS
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help
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This is a file system used on some CD-ROMs and DVDs. Since the
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file system is supported by multiple operating systems and is more
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@ -13,8 +14,3 @@ config UDF_FS
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module will be called udf.
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If unsure, say N.
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config UDF_NLS
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bool
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default y
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depends on (UDF_FS=m && NLS) || (UDF_FS=y && NLS=y)
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|
@ -572,7 +572,6 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
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case Opt_utf8:
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uopt->flags |= (1 << UDF_FLAG_UTF8);
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break;
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#ifdef CONFIG_UDF_NLS
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case Opt_iocharset:
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if (!remount) {
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if (uopt->nls_map)
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@ -581,7 +580,6 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
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uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
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}
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break;
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#endif
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case Opt_uforget:
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uopt->flags |= (1 << UDF_FLAG_UID_FORGET);
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break;
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@ -892,14 +890,14 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block)
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#endif
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}
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ret = udf_dstrCS0toUTF8(outstr, 31, pvoldesc->volIdent, 32);
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ret = udf_dstrCS0toChar(sb, outstr, 31, pvoldesc->volIdent, 32);
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if (ret < 0)
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goto out_bh;
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strncpy(UDF_SB(sb)->s_volume_ident, outstr, ret);
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udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident);
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ret = udf_dstrCS0toUTF8(outstr, 127, pvoldesc->volSetIdent, 128);
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ret = udf_dstrCS0toChar(sb, outstr, 127, pvoldesc->volSetIdent, 128);
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if (ret < 0)
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goto out_bh;
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@ -2117,7 +2115,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
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udf_err(sb, "utf8 cannot be combined with iocharset\n");
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goto parse_options_failure;
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}
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#ifdef CONFIG_UDF_NLS
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if ((uopt.flags & (1 << UDF_FLAG_NLS_MAP)) && !uopt.nls_map) {
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uopt.nls_map = load_nls_default();
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if (!uopt.nls_map)
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@ -2125,7 +2122,6 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
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else
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udf_debug("Using default NLS map\n");
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}
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#endif
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if (!(uopt.flags & (1 << UDF_FLAG_NLS_MAP)))
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uopt.flags |= (1 << UDF_FLAG_UTF8);
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@ -2279,10 +2275,8 @@ static int udf_fill_super(struct super_block *sb, void *options, int silent)
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error_out:
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iput(sbi->s_vat_inode);
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parse_options_failure:
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#ifdef CONFIG_UDF_NLS
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if (uopt.nls_map)
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unload_nls(uopt.nls_map);
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#endif
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if (lvid_open)
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udf_close_lvid(sb);
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brelse(sbi->s_lvid_bh);
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@ -2332,10 +2326,8 @@ static void udf_put_super(struct super_block *sb)
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sbi = UDF_SB(sb);
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iput(sbi->s_vat_inode);
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#ifdef CONFIG_UDF_NLS
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if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
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unload_nls(sbi->s_nls_map);
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#endif
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if (!sb_rdonly(sb))
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udf_close_lvid(sb);
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brelse(sbi->s_lvid_bh);
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|
@ -220,7 +220,8 @@ extern int udf_get_filename(struct super_block *, const uint8_t *, int,
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uint8_t *, int);
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extern int udf_put_filename(struct super_block *, const uint8_t *, int,
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uint8_t *, int);
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extern int udf_dstrCS0toUTF8(uint8_t *, int, const uint8_t *, int);
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extern int udf_dstrCS0toChar(struct super_block *, uint8_t *, int,
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const uint8_t *, int);
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/* ialloc.c */
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extern void udf_free_inode(struct inode *);
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|
254
fs/udf/unicode.c
254
fs/udf/unicode.c
@ -28,94 +28,13 @@
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#include "udf_sb.h"
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#define PLANE_SIZE 0x10000
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#define UNICODE_MAX 0x10ffff
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#define SURROGATE_MASK 0xfffff800
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#define SURROGATE_PAIR 0x0000d800
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static int udf_uni2char_utf8(wchar_t uni,
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unsigned char *out,
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int boundlen)
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{
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int u_len = 0;
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if (boundlen <= 0)
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return -ENAMETOOLONG;
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if ((uni & SURROGATE_MASK) == SURROGATE_PAIR)
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return -EINVAL;
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if (uni < 0x80) {
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out[u_len++] = (unsigned char)uni;
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} else if (uni < 0x800) {
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if (boundlen < 2)
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return -ENAMETOOLONG;
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out[u_len++] = (unsigned char)(0xc0 | (uni >> 6));
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out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));
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} else {
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if (boundlen < 3)
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return -ENAMETOOLONG;
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out[u_len++] = (unsigned char)(0xe0 | (uni >> 12));
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out[u_len++] = (unsigned char)(0x80 | ((uni >> 6) & 0x3f));
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out[u_len++] = (unsigned char)(0x80 | (uni & 0x3f));
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}
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return u_len;
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}
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static int udf_char2uni_utf8(const unsigned char *in,
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int boundlen,
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wchar_t *uni)
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{
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unsigned int utf_char;
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unsigned char c;
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int utf_cnt, u_len;
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utf_char = 0;
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utf_cnt = 0;
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for (u_len = 0; u_len < boundlen;) {
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c = in[u_len++];
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/* Complete a multi-byte UTF-8 character */
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if (utf_cnt) {
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utf_char = (utf_char << 6) | (c & 0x3f);
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if (--utf_cnt)
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continue;
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} else {
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/* Check for a multi-byte UTF-8 character */
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if (c & 0x80) {
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/* Start a multi-byte UTF-8 character */
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if ((c & 0xe0) == 0xc0) {
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utf_char = c & 0x1f;
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utf_cnt = 1;
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} else if ((c & 0xf0) == 0xe0) {
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utf_char = c & 0x0f;
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utf_cnt = 2;
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} else if ((c & 0xf8) == 0xf0) {
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utf_char = c & 0x07;
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utf_cnt = 3;
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} else if ((c & 0xfc) == 0xf8) {
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utf_char = c & 0x03;
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utf_cnt = 4;
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} else if ((c & 0xfe) == 0xfc) {
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utf_char = c & 0x01;
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utf_cnt = 5;
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} else {
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utf_cnt = -1;
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break;
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}
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continue;
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} else {
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/* Single byte UTF-8 character (most common) */
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utf_char = c;
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}
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}
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*uni = utf_char;
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break;
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}
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if (utf_cnt) {
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*uni = '?';
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return -EINVAL;
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}
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return u_len;
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}
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#define SURROGATE_LOW 0x00000400
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#define SURROGATE_CHAR_BITS 10
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#define SURROGATE_CHAR_MASK ((1 << SURROGATE_CHAR_BITS) - 1)
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#define ILLEGAL_CHAR_MARK '_'
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#define EXT_MARK '.'
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@ -124,6 +43,50 @@ static int udf_char2uni_utf8(const unsigned char *in,
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/* Number of chars we need to store generated CRC to make filename unique */
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#define CRC_LEN 5
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static unicode_t get_utf16_char(const uint8_t *str_i, int str_i_max_len,
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int str_i_idx, int u_ch, unicode_t *ret)
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{
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unicode_t c;
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int start_idx = str_i_idx;
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/* Expand OSTA compressed Unicode to Unicode */
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c = str_i[str_i_idx++];
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if (u_ch > 1)
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c = (c << 8) | str_i[str_i_idx++];
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if ((c & SURROGATE_MASK) == SURROGATE_PAIR) {
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unicode_t next;
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/* Trailing surrogate char */
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if (str_i_idx >= str_i_max_len) {
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c = UNICODE_MAX + 1;
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goto out;
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}
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/* Low surrogate must follow the high one... */
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if (c & SURROGATE_LOW) {
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c = UNICODE_MAX + 1;
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goto out;
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}
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WARN_ON_ONCE(u_ch != 2);
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next = str_i[str_i_idx++] << 8;
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next |= str_i[str_i_idx++];
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if ((next & SURROGATE_MASK) != SURROGATE_PAIR ||
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!(next & SURROGATE_LOW)) {
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c = UNICODE_MAX + 1;
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goto out;
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}
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c = PLANE_SIZE +
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((c & SURROGATE_CHAR_MASK) << SURROGATE_CHAR_BITS) +
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(next & SURROGATE_CHAR_MASK);
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}
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out:
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*ret = c;
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return str_i_idx - start_idx;
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}
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static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
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int *str_o_idx,
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const uint8_t *str_i, int str_i_max_len,
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@ -132,27 +95,29 @@ static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
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int (*conv_f)(wchar_t, unsigned char *, int),
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int translate)
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{
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uint32_t c;
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unicode_t c;
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int illChar = 0;
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int len, gotch = 0;
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|
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for (; (!gotch) && (*str_i_idx < str_i_max_len); *str_i_idx += u_ch) {
|
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while (!gotch && *str_i_idx < str_i_max_len) {
|
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if (*str_o_idx >= str_o_max_len) {
|
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*needsCRC = 1;
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return gotch;
|
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}
|
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|
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/* Expand OSTA compressed Unicode to Unicode */
|
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c = str_i[*str_i_idx];
|
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if (u_ch > 1)
|
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c = (c << 8) | str_i[*str_i_idx + 1];
|
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|
||||
if (translate && (c == '/' || c == 0))
|
||||
len = get_utf16_char(str_i, str_i_max_len, *str_i_idx, u_ch,
|
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&c);
|
||||
/* These chars cannot be converted. Replace them. */
|
||||
if (c == 0 || c > UNICODE_MAX || (conv_f && c > MAX_WCHAR_T) ||
|
||||
(translate && c == '/')) {
|
||||
illChar = 1;
|
||||
else if (illChar)
|
||||
if (!translate)
|
||||
gotch = 1;
|
||||
} else if (illChar)
|
||||
break;
|
||||
else
|
||||
gotch = 1;
|
||||
*str_i_idx += len;
|
||||
}
|
||||
if (illChar) {
|
||||
*needsCRC = 1;
|
||||
@ -160,7 +125,15 @@ static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
|
||||
gotch = 1;
|
||||
}
|
||||
if (gotch) {
|
||||
len = conv_f(c, &str_o[*str_o_idx], str_o_max_len - *str_o_idx);
|
||||
if (conv_f) {
|
||||
len = conv_f(c, &str_o[*str_o_idx],
|
||||
str_o_max_len - *str_o_idx);
|
||||
} else {
|
||||
len = utf32_to_utf8(c, &str_o[*str_o_idx],
|
||||
str_o_max_len - *str_o_idx);
|
||||
if (len < 0)
|
||||
len = -ENAMETOOLONG;
|
||||
}
|
||||
/* Valid character? */
|
||||
if (len >= 0)
|
||||
*str_o_idx += len;
|
||||
@ -168,16 +141,16 @@ static int udf_name_conv_char(uint8_t *str_o, int str_o_max_len,
|
||||
*needsCRC = 1;
|
||||
gotch = 0;
|
||||
} else {
|
||||
str_o[(*str_o_idx)++] = '?';
|
||||
str_o[(*str_o_idx)++] = ILLEGAL_CHAR_MARK;
|
||||
*needsCRC = 1;
|
||||
}
|
||||
}
|
||||
return gotch;
|
||||
}
|
||||
|
||||
static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
|
||||
static int udf_name_from_CS0(struct super_block *sb,
|
||||
uint8_t *str_o, int str_max_len,
|
||||
const uint8_t *ocu, int ocu_len,
|
||||
int (*conv_f)(wchar_t, unsigned char *, int),
|
||||
int translate)
|
||||
{
|
||||
uint32_t c;
|
||||
@ -194,6 +167,7 @@ static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
|
||||
unsigned short valueCRC;
|
||||
uint8_t ext[EXT_SIZE * NLS_MAX_CHARSET_SIZE + 1];
|
||||
uint8_t crc[CRC_LEN];
|
||||
int (*conv_f)(wchar_t, unsigned char *, int);
|
||||
|
||||
if (str_max_len <= 0)
|
||||
return 0;
|
||||
@ -203,6 +177,11 @@ static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
||||
conv_f = UDF_SB(sb)->s_nls_map->uni2char;
|
||||
else
|
||||
conv_f = NULL;
|
||||
|
||||
cmp_id = ocu[0];
|
||||
if (cmp_id != 8 && cmp_id != 16) {
|
||||
memset(str_o, 0, str_max_len);
|
||||
@ -293,18 +272,24 @@ static int udf_name_from_CS0(uint8_t *str_o, int str_max_len,
|
||||
return str_o_len;
|
||||
}
|
||||
|
||||
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 *))
|
||||
static int udf_name_to_CS0(struct super_block *sb,
|
||||
uint8_t *ocu, int ocu_max_len,
|
||||
const uint8_t *str_i, int str_len)
|
||||
{
|
||||
int i, len;
|
||||
unsigned int max_val;
|
||||
wchar_t uni_char;
|
||||
int u_len, u_ch;
|
||||
unicode_t uni_char;
|
||||
int (*conv_f)(const unsigned char *, int, wchar_t *);
|
||||
|
||||
if (ocu_max_len <= 0)
|
||||
return 0;
|
||||
|
||||
if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP))
|
||||
conv_f = UDF_SB(sb)->s_nls_map->char2uni;
|
||||
else
|
||||
conv_f = NULL;
|
||||
|
||||
memset(ocu, 0, ocu_max_len);
|
||||
ocu[0] = 8;
|
||||
max_val = 0xff;
|
||||
@ -312,36 +297,61 @@ static int udf_name_to_CS0(uint8_t *ocu, int ocu_max_len,
|
||||
|
||||
try_again:
|
||||
u_len = 1;
|
||||
for (i = 0; i < str_len; i++) {
|
||||
for (i = 0; i < str_len; i += len) {
|
||||
/* Name didn't fit? */
|
||||
if (u_len + u_ch > ocu_max_len)
|
||||
return 0;
|
||||
len = conv_f(&str_i[i], str_len - i, &uni_char);
|
||||
if (!len)
|
||||
continue;
|
||||
if (conv_f) {
|
||||
wchar_t wchar;
|
||||
|
||||
len = conv_f(&str_i[i], str_len - i, &wchar);
|
||||
if (len > 0)
|
||||
uni_char = wchar;
|
||||
} else {
|
||||
len = utf8_to_utf32(&str_i[i], str_len - i,
|
||||
&uni_char);
|
||||
}
|
||||
/* Invalid character, deal with it */
|
||||
if (len < 0) {
|
||||
if (len <= 0 || uni_char > UNICODE_MAX) {
|
||||
len = 1;
|
||||
uni_char = '?';
|
||||
}
|
||||
|
||||
if (uni_char > max_val) {
|
||||
unicode_t c;
|
||||
|
||||
if (max_val == 0xff) {
|
||||
max_val = 0xffff;
|
||||
ocu[0] = 0x10;
|
||||
u_ch = 2;
|
||||
goto try_again;
|
||||
}
|
||||
/*
|
||||
* Use UTF-16 encoding for chars outside we
|
||||
* cannot encode directly.
|
||||
*/
|
||||
if (u_len + 2 * u_ch > ocu_max_len)
|
||||
return 0;
|
||||
|
||||
uni_char -= PLANE_SIZE;
|
||||
c = SURROGATE_PAIR |
|
||||
((uni_char >> SURROGATE_CHAR_BITS) &
|
||||
SURROGATE_CHAR_MASK);
|
||||
ocu[u_len++] = (uint8_t)(c >> 8);
|
||||
ocu[u_len++] = (uint8_t)(c & 0xff);
|
||||
uni_char = SURROGATE_PAIR | SURROGATE_LOW |
|
||||
(uni_char & SURROGATE_CHAR_MASK);
|
||||
}
|
||||
|
||||
if (max_val == 0xffff)
|
||||
ocu[u_len++] = (uint8_t)(uni_char >> 8);
|
||||
ocu[u_len++] = (uint8_t)(uni_char & 0xff);
|
||||
i += len - 1;
|
||||
}
|
||||
|
||||
return u_len;
|
||||
}
|
||||
|
||||
int udf_dstrCS0toUTF8(uint8_t *utf_o, int o_len,
|
||||
int udf_dstrCS0toChar(struct super_block *sb, uint8_t *utf_o, int o_len,
|
||||
const uint8_t *ocu_i, int i_len)
|
||||
{
|
||||
int s_len = 0;
|
||||
@ -355,14 +365,12 @@ int udf_dstrCS0toUTF8(uint8_t *utf_o, int o_len,
|
||||
}
|
||||
}
|
||||
|
||||
return udf_name_from_CS0(utf_o, o_len, ocu_i, s_len,
|
||||
udf_uni2char_utf8, 0);
|
||||
return udf_name_from_CS0(sb, utf_o, o_len, ocu_i, s_len, 0);
|
||||
}
|
||||
|
||||
int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
|
||||
uint8_t *dname, int dlen)
|
||||
{
|
||||
int (*conv_f)(wchar_t, unsigned char *, int);
|
||||
int ret;
|
||||
|
||||
if (!slen)
|
||||
@ -371,14 +379,7 @@ int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
|
||||
if (dlen <= 0)
|
||||
return 0;
|
||||
|
||||
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
|
||||
conv_f = udf_uni2char_utf8;
|
||||
} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
|
||||
conv_f = UDF_SB(sb)->s_nls_map->uni2char;
|
||||
} else
|
||||
BUG();
|
||||
|
||||
ret = udf_name_from_CS0(dname, dlen, sname, slen, conv_f, 1);
|
||||
ret = udf_name_from_CS0(sb, dname, dlen, sname, slen, 1);
|
||||
/* Zero length filename isn't valid... */
|
||||
if (ret == 0)
|
||||
ret = -EINVAL;
|
||||
@ -388,15 +389,6 @@ int udf_get_filename(struct super_block *sb, const uint8_t *sname, int slen,
|
||||
int udf_put_filename(struct super_block *sb, const uint8_t *sname, int slen,
|
||||
uint8_t *dname, int dlen)
|
||||
{
|
||||
int (*conv_f)(const unsigned char *, int, wchar_t *);
|
||||
|
||||
if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) {
|
||||
conv_f = udf_char2uni_utf8;
|
||||
} else if (UDF_QUERY_FLAG(sb, UDF_FLAG_NLS_MAP)) {
|
||||
conv_f = UDF_SB(sb)->s_nls_map->char2uni;
|
||||
} else
|
||||
BUG();
|
||||
|
||||
return udf_name_to_CS0(dname, dlen, sname, slen, conv_f);
|
||||
return udf_name_to_CS0(sb, dname, dlen, sname, slen);
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user