Unverified Commit 4534a70b authored by Konstantin Komarov's avatar Konstantin Komarov
Browse files

fs/ntfs3: Add headers and misc files



This adds headers and misc files

Signed-off-by: default avatarKonstantin Komarov <almaz.alexandrovich@paragon-software.com>
parent 36a21d51
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fs/ntfs3/debug.h

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/* SPDX-License-Identifier: GPL-2.0 */
/*
 *
 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
 *
 * useful functions for debuging
 */

// clang-format off
#ifndef Add2Ptr
#define Add2Ptr(P, I)		((void *)((u8 *)(P) + (I)))
#define PtrOffset(B, O)		((size_t)((size_t)(O) - (size_t)(B)))
#endif

#define QuadAlign(n)		(((n) + 7u) & (~7u))
#define IsQuadAligned(n)	(!((size_t)(n)&7u))
#define Quad2Align(n)		(((n) + 15u) & (~15u))
#define IsQuad2Aligned(n)	(!((size_t)(n)&15u))
#define Quad4Align(n)		(((n) + 31u) & (~31u))
#define IsSizeTAligned(n)	(!((size_t)(n) & (sizeof(size_t) - 1)))
#define DwordAlign(n)		(((n) + 3u) & (~3u))
#define IsDwordAligned(n)	(!((size_t)(n)&3u))
#define WordAlign(n)		(((n) + 1u) & (~1u))
#define IsWordAligned(n)	(!((size_t)(n)&1u))

#ifdef CONFIG_PRINTK
__printf(2, 3)
void ntfs_printk(const struct super_block *sb, const char *fmt, ...);
__printf(2, 3)
void ntfs_inode_printk(struct inode *inode, const char *fmt, ...);
#else
static inline __printf(2, 3)
void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
{
}

static inline __printf(2, 3)
void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
{
}
#endif

/*
 * Logging macros ( thanks Joe Perches <joe@perches.com> for implementation )
 */

#define ntfs_err(sb, fmt, ...)  ntfs_printk(sb, KERN_ERR fmt, ##__VA_ARGS__)
#define ntfs_warn(sb, fmt, ...) ntfs_printk(sb, KERN_WARNING fmt, ##__VA_ARGS__)
#define ntfs_info(sb, fmt, ...) ntfs_printk(sb, KERN_INFO fmt, ##__VA_ARGS__)
#define ntfs_notice(sb, fmt, ...)                                              \
	ntfs_printk(sb, KERN_NOTICE fmt, ##__VA_ARGS__)

#define ntfs_inode_err(inode, fmt, ...)                                        \
	ntfs_inode_printk(inode, KERN_ERR fmt, ##__VA_ARGS__)
#define ntfs_inode_warn(inode, fmt, ...)                                       \
	ntfs_inode_printk(inode, KERN_WARNING fmt, ##__VA_ARGS__)

#define ntfs_malloc(s)		kmalloc(s, GFP_NOFS)
#define ntfs_zalloc(s)		kzalloc(s, GFP_NOFS)
#define ntfs_vmalloc(s)		kvmalloc(s, GFP_KERNEL)
#define ntfs_free(p)		kfree(p)
#define ntfs_vfree(p)		kvfree(p)
#define ntfs_memdup(src, len)	kmemdup(src, len, GFP_NOFS)
// clang-format on

fs/ntfs3/ntfs.h

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fs/ntfs3/ntfs_fs.h

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fs/ntfs3/upcase.c

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// SPDX-License-Identifier: GPL-2.0
/*
 *
 * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
 *
 */
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/module.h>
#include <linux/nls.h>

#include "debug.h"
#include "ntfs.h"
#include "ntfs_fs.h"

static inline u16 upcase_unicode_char(const u16 *upcase, u16 chr)
{
	if (chr < 'a')
		return chr;

	if (chr <= 'z')
		return chr - ('a' - 'A');

	return upcase[chr];
}

/*
 * Thanks Kari Argillander <kari.argillander@gmail.com> for idea and implementation 'bothcase'
 *
 * Straigth way to compare names:
 * - case insensitive
 * - if name equals and 'bothcases' then
 * - case sensitive
 * 'Straigth way' code scans input names twice in worst case
 * Optimized code scans input names only once
 */
int ntfs_cmp_names(const __le16 *s1, size_t l1, const __le16 *s2, size_t l2,
		   const u16 *upcase, bool bothcase)
{
	int diff1 = 0;
	int diff2;
	size_t len = min(l1, l2);

	if (!bothcase && upcase)
		goto case_insentive;

	for (; len; s1++, s2++, len--) {
		diff1 = le16_to_cpu(*s1) - le16_to_cpu(*s2);
		if (diff1) {
			if (bothcase && upcase)
				goto case_insentive;

			return diff1;
		}
	}
	return l1 - l2;

case_insentive:
	for (; len; s1++, s2++, len--) {
		diff2 = upcase_unicode_char(upcase, le16_to_cpu(*s1)) -
			upcase_unicode_char(upcase, le16_to_cpu(*s2));
		if (diff2)
			return diff2;
	}

	diff2 = l1 - l2;
	return diff2 ? diff2 : diff1;
}

int ntfs_cmp_names_cpu(const struct cpu_str *uni1, const struct le_str *uni2,
		       const u16 *upcase, bool bothcase)
{
	const u16 *s1 = uni1->name;
	const __le16 *s2 = uni2->name;
	size_t l1 = uni1->len;
	size_t l2 = uni2->len;
	size_t len = min(l1, l2);
	int diff1 = 0;
	int diff2;

	if (!bothcase && upcase)
		goto case_insentive;

	for (; len; s1++, s2++, len--) {
		diff1 = *s1 - le16_to_cpu(*s2);
		if (diff1) {
			if (bothcase && upcase)
				goto case_insentive;

			return diff1;
		}
	}
	return l1 - l2;

case_insentive:
	for (; len; s1++, s2++, len--) {
		diff2 = upcase_unicode_char(upcase, *s1) -
			upcase_unicode_char(upcase, le16_to_cpu(*s2));
		if (diff2)
			return diff2;
	}

	diff2 = l1 - l2;
	return diff2 ? diff2 : diff1;
}