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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
commit19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch)
tree42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/spdk/lib/ftl/ftl_addr.h
parentInitial commit. (diff)
downloadceph-upstream/16.2.11+ds.tar.xz
ceph-upstream/16.2.11+ds.zip
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/spdk/lib/ftl/ftl_addr.h')
-rw-r--r--src/spdk/lib/ftl/ftl_addr.h76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/spdk/lib/ftl/ftl_addr.h b/src/spdk/lib/ftl/ftl_addr.h
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index 000000000..36d2ffb00
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+++ b/src/spdk/lib/ftl/ftl_addr.h
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) Intel Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FTL_ADDR_H
+#define FTL_ADDR_H
+
+#include "spdk/stdinc.h"
+
+/* Marks address as invalid */
+#define FTL_ADDR_INVALID (-1)
+/* Marks LBA as invalid */
+#define FTL_LBA_INVALID ((uint64_t)-1)
+/* Smallest data unit size */
+#define FTL_BLOCK_SIZE 4096
+
+/* This structure represents on-disk address. It can have one of the following */
+/* formats: */
+/* - offset inside the disk */
+/* - cache_offset inside the cache (indicated by the cached flag) */
+/* - packed version of the two formats above (can be only used when the */
+/* offset can be represented in less than 32 bits) */
+/* Packed format is used, when possible, to avoid wasting RAM on the L2P table. */
+struct ftl_addr {
+ union {
+ struct {
+ uint64_t cache_offset : 63;
+ uint64_t cached : 1;
+ };
+
+ struct {
+ union {
+ struct {
+ uint32_t cache_offset : 31;
+ uint32_t cached : 1;
+ };
+
+ uint32_t offset;
+ };
+ uint32_t rsvd;
+ } pack;
+
+ uint64_t offset;
+ };
+};
+
+#endif /* FTL_ADDR_H */