netfs, fscache: Move fs/fscache/* into fs/netfs/

There's a problem with dependencies between netfslib and fscache as each
wants to access some functions of the other.  Deal with this by moving
fs/fscache/* into fs/netfs/ and renaming those files to begin with
"fscache-".

For the moment, the moved files are changed as little as possible and an
fscache module is still built.  A subsequent patch will integrate them.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
cc: Christian Brauner <christian@brauner.io>
cc: linux-fsdevel@vger.kernel.org
cc: linux-cachefs@redhat.com

1 files changed, 0 insertions, 121 deletions

diff --git a/fs/fscache/main.c b/fs/fscache/main.c
deleted file mode 100644
index dad85fd84f6f..000000000000
--- a/fs/fscache/main.c
+++ /dev/null
@@ -1,121 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* General filesystem local caching manager
- *
- * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- */
-
-#define FSCACHE_DEBUG_LEVEL CACHE
-#include <linux/module.h>
-#include <linux/init.h>
-#define CREATE_TRACE_POINTS
-#include "internal.h"
-
-MODULE_DESCRIPTION("FS Cache Manager");
-MODULE_AUTHOR("Red Hat, Inc.");
-MODULE_LICENSE("GPL");
-
-unsigned fscache_debug;
-module_param_named(debug, fscache_debug, uint,
-		   S_IWUSR | S_IRUGO);
-MODULE_PARM_DESC(fscache_debug,
-		 "FS-Cache debugging mask");
-
-EXPORT_TRACEPOINT_SYMBOL(fscache_access_cache);
-EXPORT_TRACEPOINT_SYMBOL(fscache_access_volume);
-EXPORT_TRACEPOINT_SYMBOL(fscache_access);
-
-struct workqueue_struct *fscache_wq;
-EXPORT_SYMBOL(fscache_wq);
-
-/*
- * Mixing scores (in bits) for (7,20):
- * Input delta: 1-bit      2-bit
- * 1 round:     330.3     9201.6
- * 2 rounds:   1246.4    25475.4
- * 3 rounds:   1907.1    31295.1
- * 4 rounds:   2042.3    31718.6
- * Perfect:    2048      31744
- *            (32*64)   (32*31/2 * 64)
- */
-#define HASH_MIX(x, y, a)	\
-	(	x ^= (a),	\
-	y ^= x,	x = rol32(x, 7),\
-	x += y,	y = rol32(y,20),\
-	y *= 9			)
-
-static inline unsigned int fold_hash(unsigned long x, unsigned long y)
-{
-	/* Use arch-optimized multiply if one exists */
-	return __hash_32(y ^ __hash_32(x));
-}
-
-/*
- * Generate a hash.  This is derived from full_name_hash(), but we want to be
- * sure it is arch independent and that it doesn't change as bits of the
- * computed hash value might appear on disk.  The caller must guarantee that
- * the source data is a multiple of four bytes in size.
- */
-unsigned int fscache_hash(unsigned int salt, const void *data, size_t len)
-{
-	const __le32 *p = data;
-	unsigned int a, x = 0, y = salt, n = len / sizeof(__le32);
-
-	for (; n; n--) {
-		a = le32_to_cpu(*p++);
-		HASH_MIX(x, y, a);
-	}
-	return fold_hash(x, y);
-}
-
-/*
- * initialise the fs caching module
- */
-static int __init fscache_init(void)
-{
-	int ret = -ENOMEM;
-
-	fscache_wq = alloc_workqueue("fscache", WQ_UNBOUND | WQ_FREEZABLE, 0);
-	if (!fscache_wq)
-		goto error_wq;
-
-	ret = fscache_proc_init();
-	if (ret < 0)
-		goto error_proc;
-
-	fscache_cookie_jar = kmem_cache_create("fscache_cookie_jar",
-					       sizeof(struct fscache_cookie),
-					       0, 0, NULL);
-	if (!fscache_cookie_jar) {
-		pr_notice("Failed to allocate a cookie jar\n");
-		ret = -ENOMEM;
-		goto error_cookie_jar;
-	}
-
-	pr_notice("Loaded\n");
-	return 0;
-
-error_cookie_jar:
-	fscache_proc_cleanup();
-error_proc:
-	destroy_workqueue(fscache_wq);
-error_wq:
-	return ret;
-}
-
-fs_initcall(fscache_init);
-
-/*
- * clean up on module removal
- */
-static void __exit fscache_exit(void)
-{
-	_enter("");
-
-	kmem_cache_destroy(fscache_cookie_jar);
-	fscache_proc_cleanup();
-	destroy_workqueue(fscache_wq);
-	pr_notice("Unloaded\n");
-}
-
-module_exit(fscache_exit);