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-rw-r--r--fs/fscache/io.c116
1 files changed, 0 insertions, 116 deletions
diff --git a/fs/fscache/io.c b/fs/fscache/io.c
deleted file mode 100644
index 8ecc1141802f..000000000000
--- a/fs/fscache/io.c
+++ /dev/null
@@ -1,116 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/* Cache data I/O routines
- *
- * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@redhat.com)
- */
-
-#define FSCACHE_DEBUG_LEVEL PAGE
-#include <linux/module.h>
-#define FSCACHE_USE_NEW_IO_API
-#include <linux/fscache-cache.h>
-#include <linux/slab.h>
-#include <linux/netfs.h>
-#include "internal.h"
-
-/*
- * Start a cache read operation.
- * - we return:
- * -ENOMEM - out of memory, some pages may be being read
- * -ERESTARTSYS - interrupted, some pages may be being read
- * -ENOBUFS - no backing object or space available in which to cache any
- * pages not being read
- * -ENODATA - no data available in the backing object for some or all of
- * the pages
- * 0 - dispatched a read on all pages
- */
-int __fscache_begin_read_operation(struct netfs_read_request *rreq,
- struct fscache_cookie *cookie)
-{
- struct fscache_retrieval *op;
- struct fscache_object *object;
- bool wake_cookie = false;
- int ret;
-
- _enter("rr=%08x", rreq->debug_id);
-
- fscache_stat(&fscache_n_retrievals);
-
- if (hlist_empty(&cookie->backing_objects))
- goto nobufs;
-
- if (test_bit(FSCACHE_COOKIE_INVALIDATING, &cookie->flags)) {
- _leave(" = -ENOBUFS [invalidating]");
- return -ENOBUFS;
- }
-
- ASSERTCMP(cookie->def->type, !=, FSCACHE_COOKIE_TYPE_INDEX);
-
- if (fscache_wait_for_deferred_lookup(cookie) < 0)
- return -ERESTARTSYS;
-
- op = fscache_alloc_retrieval(cookie, NULL, NULL, NULL);
- if (!op)
- return -ENOMEM;
- trace_fscache_page_op(cookie, NULL, &op->op, fscache_page_op_retr_multi);
-
- spin_lock(&cookie->lock);
-
- if (!fscache_cookie_enabled(cookie) ||
- hlist_empty(&cookie->backing_objects))
- goto nobufs_unlock;
- object = hlist_entry(cookie->backing_objects.first,
- struct fscache_object, cookie_link);
-
- __fscache_use_cookie(cookie);
- atomic_inc(&object->n_reads);
- __set_bit(FSCACHE_OP_DEC_READ_CNT, &op->op.flags);
-
- if (fscache_submit_op(object, &op->op) < 0)
- goto nobufs_unlock_dec;
- spin_unlock(&cookie->lock);
-
- fscache_stat(&fscache_n_retrieval_ops);
-
- /* we wait for the operation to become active, and then process it
- * *here*, in this thread, and not in the thread pool */
- ret = fscache_wait_for_operation_activation(
- object, &op->op,
- __fscache_stat(&fscache_n_retrieval_op_waits),
- __fscache_stat(&fscache_n_retrievals_object_dead));
- if (ret < 0)
- goto error;
-
- /* ask the cache to honour the operation */
- ret = object->cache->ops->begin_read_operation(rreq, op);
-
-error:
- if (ret == -ENOMEM)
- fscache_stat(&fscache_n_retrievals_nomem);
- else if (ret == -ERESTARTSYS)
- fscache_stat(&fscache_n_retrievals_intr);
- else if (ret == -ENODATA)
- fscache_stat(&fscache_n_retrievals_nodata);
- else if (ret < 0)
- fscache_stat(&fscache_n_retrievals_nobufs);
- else
- fscache_stat(&fscache_n_retrievals_ok);
-
- fscache_put_retrieval(op);
- _leave(" = %d", ret);
- return ret;
-
-nobufs_unlock_dec:
- atomic_dec(&object->n_reads);
- wake_cookie = __fscache_unuse_cookie(cookie);
-nobufs_unlock:
- spin_unlock(&cookie->lock);
- fscache_put_retrieval(op);
- if (wake_cookie)
- __fscache_wake_unused_cookie(cookie);
-nobufs:
- fscache_stat(&fscache_n_retrievals_nobufs);
- _leave(" = -ENOBUFS");
- return -ENOBUFS;
-}
-EXPORT_SYMBOL(__fscache_begin_read_operation);