3d7bfea8b8
This adds a case insensitive hash function to allow taking the hash without needing to allocate a casefolded copy of the string. The existing d_hash implementations for casefolding allocate memory within rcu-walk, by avoiding it we can be more efficient and avoid worrying about a failed allocation. Signed-off-by: Daniel Rosenberg <drosen@google.com> Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.com> Reviewed-by: Eric Biggers <ebiggers@google.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
37 lines
1 KiB
C
37 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_UNICODE_H
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#define _LINUX_UNICODE_H
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#include <linux/init.h>
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#include <linux/dcache.h>
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struct unicode_map {
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const char *charset;
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int version;
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};
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int utf8_validate(const struct unicode_map *um, const struct qstr *str);
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int utf8_strncmp(const struct unicode_map *um,
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const struct qstr *s1, const struct qstr *s2);
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int utf8_strncasecmp(const struct unicode_map *um,
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const struct qstr *s1, const struct qstr *s2);
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int utf8_strncasecmp_folded(const struct unicode_map *um,
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const struct qstr *cf,
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const struct qstr *s1);
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int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
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unsigned char *dest, size_t dlen);
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int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
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unsigned char *dest, size_t dlen);
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int utf8_casefold_hash(const struct unicode_map *um, const void *salt,
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struct qstr *str);
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struct unicode_map *utf8_load(const char *version);
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void utf8_unload(struct unicode_map *um);
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#endif /* _LINUX_UNICODE_H */
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