move Rust sources to top level, C sources into c_src

This moves the Rust sources out of rust_src/ and into the top level.
Running the bcachefs executable out of the development tree is now:

$ ./target/release/bcachefs command
or
$ cargo run --profile release -- command

instead of "./bcachefs command".

Building and installing is still:

$ make && make install

Signed-off-by: Thomas Bertschinger <tahbertschinger@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 0 insertions, 130 deletions

diff --git a/linux/string_helpers.c b/linux/string_helpers.c
deleted file mode 100644
index 0810ca13..00000000
--- a/linux/string_helpers.c
+++ /dev/null
@@ -1,130 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Helpers for formatting and printing strings
- *
- * Copyright 31 August 2008 James Bottomley
- * Copyright (C) 2013, Intel Corporation
- */
-#include <linux/bug.h>
-#include <linux/kernel.h>
-#include <linux/math64.h>
-#include <linux/export.h>
-#include <linux/ctype.h>
-#include <linux/device.h>
-#include <linux/errno.h>
-#include <linux/fs.h>
-#include <linux/limits.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/string_helpers.h>
-
-/**
- * string_get_size - get the size in the specified units
- * @size:	The size to be converted in blocks
- * @blk_size:	Size of the block (use 1 for size in bytes)
- * @units:	units to use (powers of 1000 or 1024)
- * @buf:	buffer to format to
- * @len:	length of buffer
- *
- * This function returns a string formatted to 3 significant figures
- * giving the size in the required units.  @buf should have room for
- * at least 9 bytes and will always be zero terminated.
- *
- */
-int string_get_size(u64 size, u64 blk_size, const enum string_size_units units,
-		    char *buf, int len)
-{
-	static const char *const units_10[] = {
-		"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"
-	};
-	static const char *const units_2[] = {
-		"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"
-	};
-	static const char *const *const units_str[] = {
-		[STRING_UNITS_10] = units_10,
-		[STRING_UNITS_2] = units_2,
-	};
-	static const unsigned int divisor[] = {
-		[STRING_UNITS_10] = 1000,
-		[STRING_UNITS_2] = 1024,
-	};
-	static const unsigned int rounding[] = { 500, 50, 5 };
-	int i = 0, j;
-	u32 remainder = 0, sf_cap;
-	char tmp[12];
-	const char *unit;
-
-	tmp[0] = '\0';
-
-	if (blk_size == 0)
-		size = 0;
-	if (size == 0)
-		goto out;
-
-	/* This is Napier's algorithm.  Reduce the original block size to
-	 *
-	 * coefficient * divisor[units]^i
-	 *
-	 * we do the reduction so both coefficients are just under 32 bits so
-	 * that multiplying them together won't overflow 64 bits and we keep
-	 * as much precision as possible in the numbers.
-	 *
-	 * Note: it's safe to throw away the remainders here because all the
-	 * precision is in the coefficients.
-	 */
-	while (blk_size >> 32) {
-		do_div(blk_size, divisor[units]);
-		i++;
-	}
-
-	while (size >> 32) {
-		do_div(size, divisor[units]);
-		i++;
-	}
-
-	/* now perform the actual multiplication keeping i as the sum of the
-	 * two logarithms */
-	size *= blk_size;
-
-	/* and logarithmically reduce it until it's just under the divisor */
-	while (size >= divisor[units]) {
-		remainder = do_div(size, divisor[units]);
-		i++;
-	}
-
-	/* work out in j how many digits of precision we need from the
-	 * remainder */
-	sf_cap = size;
-	for (j = 0; sf_cap*10 < 1000; j++)
-		sf_cap *= 10;
-
-	if (units == STRING_UNITS_2) {
-		/* express the remainder as a decimal.  It's currently the
-		 * numerator of a fraction whose denominator is
-		 * divisor[units], which is 1 << 10 for STRING_UNITS_2 */
-		remainder *= 1000;
-		remainder >>= 10;
-	}
-
-	/* add a 5 to the digit below what will be printed to ensure
-	 * an arithmetical round up and carry it through to size */
-	remainder += rounding[j];
-	if (remainder >= 1000) {
-		remainder -= 1000;
-		size += 1;
-	}
-
-	if (j) {
-		snprintf(tmp, sizeof(tmp), ".%03u", remainder);
-		tmp[j+1] = '\0';
-	}
-
- out:
-	if (i >= ARRAY_SIZE(units_2))
-		unit = "UNK";
-	else
-		unit = units_str[units][i];
-
-	return snprintf(buf, len, "%u%s %s", (u32)size, tmp, unit);
-}
-EXPORT_SYMBOL(string_get_size);