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Paulo AlcantaraandSteve French
4fc3a433c1
Use atomic_t for cifs_sb_info::mnt_cifs_flags as it's currently accessed locklessly and may be changed concurrently in mount/remount and reconnect paths. Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org> Reviewed-by: David Howells <dhowells@redhat.com> Cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
87 lines
2.9 KiB
C
87 lines
2.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* cifs_unicode: Unicode kernel case support
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*
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* Function:
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* Convert a unicode character to upper or lower case using
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* compressed tables.
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*
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* Copyright (c) International Business Machines Corp., 2000,2009
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*
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* Notes:
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* These APIs are based on the C library functions. The semantics
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* should match the C functions but with expanded size operands.
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*
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* The upper/lower functions are based on a table created by mkupr.
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* This is a compressed table of upper and lower case conversion.
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*/
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#ifndef _CIFS_UNICODE_H
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#define _CIFS_UNICODE_H
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#include <asm/byteorder.h>
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#include <linux/types.h>
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#include <linux/nls.h>
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#include "../../nls/nls_ucs2_utils.h"
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#include "cifsglob.h"
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/*
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* Macs use an older "SFM" mapping of the symbols above. Fortunately it does
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* not conflict (although almost does) with the mapping above.
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*/
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#define SFM_DOUBLEQUOTE ((__u16) 0xF020)
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#define SFM_ASTERISK ((__u16) 0xF021)
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#define SFM_QUESTION ((__u16) 0xF025)
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#define SFM_COLON ((__u16) 0xF022)
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#define SFM_GRTRTHAN ((__u16) 0xF024)
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#define SFM_LESSTHAN ((__u16) 0xF023)
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#define SFM_PIPE ((__u16) 0xF027)
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#define SFM_SLASH ((__u16) 0xF026)
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#define SFM_SPACE ((__u16) 0xF028)
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#define SFM_PERIOD ((__u16) 0xF029)
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/*
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* Mapping mechanism to use when one of the seven reserved characters is
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* encountered. We can only map using one of the mechanisms at a time
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* since otherwise readdir could return directory entries which we would
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* not be able to open
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*
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* NO_MAP_UNI_RSVD = do not perform any remapping of the character
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* SFM_MAP_UNI_RSVD = map reserved characters using SFM scheme (MAC compatible)
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* SFU_MAP_UNI_RSVD = map reserved characters ala SFU ("mapchars" option)
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*
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*/
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#define NO_MAP_UNI_RSVD 0
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#define SFM_MAP_UNI_RSVD 1
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#define SFU_MAP_UNI_RSVD 2
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int cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
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const struct nls_table *codepage, int map_type);
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int cifs_utf16_bytes(const __le16 *from, int maxbytes,
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const struct nls_table *codepage);
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int cifs_strtoUTF16(__le16 *to, const char *from, int len,
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const struct nls_table *codepage);
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char *cifs_strndup_from_utf16(const char *src, const int maxlen,
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const bool is_unicode,
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const struct nls_table *codepage);
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int cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
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const struct nls_table *cp, int map_chars);
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__le16 *cifs_strndup_to_utf16(const char *src, const int maxlen,
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int *utf16_len, const struct nls_table *cp,
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int remap);
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wchar_t cifs_toupper(wchar_t in);
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static inline int cifs_remap(const struct cifs_sb_info *cifs_sb)
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{
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unsigned int sbflags = cifs_sb_flags(cifs_sb);
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if (sbflags & CIFS_MOUNT_MAP_SFM_CHR)
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return SFM_MAP_UNI_RSVD;
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if (sbflags & CIFS_MOUNT_MAP_SPECIAL_CHR)
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return SFU_MAP_UNI_RSVD;
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return NO_MAP_UNI_RSVD;
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}
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#endif /* _CIFS_UNICODE_H */
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