dm vdo: move indexer files into sub-directory

The goal is to assist high-level understanding of which code is
conceptually specific to VDO's indexer.
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Matthew Sakai <msakai@redhat.com>

drivers/md/dm-vdo/Makefile

 # SPDX-License-Identifier: GPL-2.0-only
 
+ccflags-y := -I$(srctree)/$(src) -I$(srctree)/$(src)/indexer
+
 obj-$(CONFIG_DM_VDO) += dm-vdo.o
 
 dm-vdo-objs := \
 	action-manager.o \
 	admin-state.o \
 	block-map.o \
-	chapter-index.o \
 	completion.o \
-	config.o \
 	data-vio.o \
 	dedupe.o \
-	delta-index.o \
 	dm-vdo-target.o \
 	dump.o \
 	encodings.o \
 	errors.o \
 	flush.o \
 	funnel-queue.o \
-	funnel-requestqueue.o \
 	funnel-workqueue.o \
-	geometry.o \
-	index-layout.o \
-	index.o \
-	index-page-map.o \
-	index-session.o \
 	int-map.o \
-	io-factory.o \
 	io-submitter.o \
 	logger.o \
 	logical-zone.o \
 	memory-alloc.o \
 	message-stats.o \
 	murmurhash3.o \
-	open-chapter.o \
 	packer.o \
 	permassert.o \
 	physical-zone.o \
 	pool-sysfs.o \
 	pool-sysfs-stats.o \
 	priority-table.o \
-	radix-sort.o \
 	recovery-journal.o \
 	repair.o \
 	slab-depot.o \
-	sparse-cache.o \
 	status-codes.o \
 	string-utils.o \
 	sysfs.o \
@@ -54,6 +43,19 @@ dm-vdo-objs := \
 	uds-sysfs.o \
 	vdo.o \
 	vio.o \
-	volume-index.o \
-	volume.o \
-	wait-queue.o
+	wait-queue.o \
+	indexer/chapter-index.o \
+	indexer/config.o \
+	indexer/delta-index.o \
+	indexer/funnel-requestqueue.o \
+	indexer/geometry.o \
+	indexer/index.o \
+	indexer/index-layout.o \
+	indexer/index-page-map.o \
+	indexer/index-session.o \
+	indexer/io-factory.o \
+	indexer/open-chapter.o \
+	indexer/radix-sort.o \
+	indexer/sparse-cache.o \
+	indexer/volume.o \
+	indexer/volume-index.o

drivers/md/dm-vdo/data-vio.h

@@ -10,9 +10,10 @@
 #include <linux/bio.h>
 #include <linux/list.h>
 
-#include "indexer.h"
 #include "permassert.h"
 
+#include "indexer.h"
+
 #include "block-map.h"
 #include "completion.h"
 #include "constants.h"

drivers/md/dm-vdo/dedupe.c

@@ -126,13 +126,14 @@
 #include <linux/spinlock.h>
 #include <linux/timer.h>
 
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "numeric.h"
 #include "permassert.h"
 #include "string-utils.h"
 
+#include "indexer.h"
+
 #include "action-manager.h"
 #include "admin-state.h"
 #include "completion.h"

drivers/md/dm-vdo/chapter-index.c → drivers/md/dm-vdo/indexer/chapter-index.c

@@ -6,12 +6,13 @@
 #include "chapter-index.h"
 
 #include "errors.h"
-#include "hash-utils.h"
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "permassert.h"
 
+#include "hash-utils.h"
+#include "indexer.h"
+
 int uds_make_open_chapter_index(struct open_chapter_index **chapter_index,
 				const struct index_geometry *geometry, u64 volume_nonce)
 {

drivers/md/dm-vdo/delta-index.c → drivers/md/dm-vdo/indexer/delta-index.c

@@ -10,10 +10,8 @@
 #include <linux/limits.h>
 #include <linux/log2.h>
 
-#include "config.h"
 #include "cpu.h"
 #include "errors.h"
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "numeric.h"
@@ -21,6 +19,9 @@
 #include "string-utils.h"
 #include "time-utils.h"
 
+#include "config.h"
+#include "indexer.h"
+
 /*
  * The entries in a delta index could be stored in a single delta list, but to reduce search times
  * and update costs it uses multiple delta lists. These lists are stored in a single chunk of

drivers/md/dm-vdo/delta-index.h → drivers/md/dm-vdo/indexer/delta-index.h

@@ -8,11 +8,12 @@
 
 #include <linux/cache.h>
 
-#include "config.h"
-#include "io-factory.h"
 #include "numeric.h"
 #include "time-utils.h"
 
+#include "config.h"
+#include "io-factory.h"
+
 /*
  * A delta index is a key-value store, where each entry maps an address (the key) to a payload (the
  * value). The entries are sorted by address, and only the delta between successive addresses is

drivers/md/dm-vdo/geometry.c → drivers/md/dm-vdo/indexer/geometry.c

@@ -8,13 +8,14 @@
 #include <linux/compiler.h>
 #include <linux/log2.h>
 
-#include "delta-index.h"
 #include "errors.h"
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "permassert.h"
 
+#include "delta-index.h"
+#include "indexer.h"
+
 /*
  * An index volume is divided into a fixed number of fixed-size chapters, each consisting of a
  * fixed number of fixed-size pages. The volume layout is defined by two constants and four

drivers/md/dm-vdo/hash-utils.h → drivers/md/dm-vdo/indexer/hash-utils.h

@@ -6,9 +6,10 @@
 #ifndef UDS_HASH_UTILS_H
 #define UDS_HASH_UTILS_H
 
+#include "numeric.h"
+
 #include "geometry.h"
 #include "indexer.h"
-#include "numeric.h"
 
 /* Utilities for extracting portions of a request name for various uses. */
 

drivers/md/dm-vdo/index-layout.c → drivers/md/dm-vdo/indexer/index-layout.c

@@ -7,13 +7,14 @@
 
 #include <linux/random.h>
 
-#include "config.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "murmurhash3.h"
 #include "numeric.h"
-#include "open-chapter.h"
 #include "time-utils.h"
+
+#include "config.h"
+#include "open-chapter.h"
 #include "volume-index.h"
 
 /*

drivers/md/dm-vdo/index-page-map.c → drivers/md/dm-vdo/indexer/index-page-map.c

@@ -6,8 +6,6 @@
 #include "index-page-map.h"
 
 #include "errors.h"
-#include "hash-utils.h"
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "numeric.h"
@@ -15,6 +13,9 @@
 #include "string-utils.h"
 #include "thread-utils.h"
 
+#include "hash-utils.h"
+#include "indexer.h"
+
 /*
  * The index page map is conceptually a two-dimensional array indexed by chapter number and index
  * page number within the chapter. Each entry contains the number of the last delta list on that

drivers/md/dm-vdo/index-session.c → drivers/md/dm-vdo/indexer/index-session.c

@@ -7,13 +7,14 @@
 
 #include <linux/atomic.h>
 
-#include "funnel-requestqueue.h"
-#include "index.h"
-#include "index-layout.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "time-utils.h"
 
+#include "funnel-requestqueue.h"
+#include "index.h"
+#include "index-layout.h"
+
 /*
  * The index session contains a lock (the request_mutex) which ensures that only one thread can
  * change the state of its index at a time. The state field indicates the current state of the

drivers/md/dm-vdo/index-session.h → drivers/md/dm-vdo/indexer/index-session.h

@@ -9,9 +9,10 @@
 #include <linux/atomic.h>
 #include <linux/cache.h>
 
+#include "thread-utils.h"
+
 #include "config.h"
 #include "indexer.h"
-#include "thread-utils.h"
 
 /*
  * The index session mediates all interactions with a UDS index. Once the index session is created,

drivers/md/dm-vdo/index.c → drivers/md/dm-vdo/indexer/index.c

@@ -6,10 +6,11 @@
 
 #include "index.h"
 
-#include "funnel-requestqueue.h"
-#include "hash-utils.h"
 #include "logger.h"
 #include "memory-alloc.h"
+
+#include "funnel-requestqueue.h"
+#include "hash-utils.h"
 #include "sparse-cache.h"
 
 static const u64 NO_LAST_SAVE = U64_MAX;

drivers/md/dm-vdo/open-chapter.c → drivers/md/dm-vdo/indexer/open-chapter.c

@@ -7,13 +7,14 @@
 
 #include <linux/log2.h>
 
-#include "config.h"
-#include "hash-utils.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "numeric.h"
 #include "permassert.h"
 
+#include "config.h"
+#include "hash-utils.h"
+
 /*
  * Each index zone has a dedicated open chapter zone structure which gets an equal share of the
  * open chapter space. Records are assigned to zones based on their record name. Within each zone,

drivers/md/dm-vdo/sparse-cache.c → drivers/md/dm-vdo/indexer/sparse-cache.c

@@ -9,13 +9,14 @@
 #include <linux/delay.h>
 #include <linux/dm-bufio.h>
 
-#include "chapter-index.h"
-#include "config.h"
-#include "index.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "permassert.h"
 
+#include "chapter-index.h"
+#include "config.h"
+#include "index.h"
+
 /*
  * Since the cache is small, it is implemented as a simple array of cache entries. Searching for a
  * specific virtual chapter is implemented as a linear search. The cache replacement policy is

drivers/md/dm-vdo/volume-index.c → drivers/md/dm-vdo/indexer/volume-index.c

@@ -10,17 +10,18 @@
 #include <linux/compiler.h>
 #include <linux/log2.h>
 
-#include "config.h"
 #include "errors.h"
-#include "geometry.h"
-#include "hash-utils.h"
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "numeric.h"
 #include "permassert.h"
 #include "thread-utils.h"
 
+#include "config.h"
+#include "geometry.h"
+#include "hash-utils.h"
+#include "indexer.h"
+
 /*
  * The volume index is a combination of two separate subindexes, one containing sparse hook entries
  * (retained for all chapters), and one containing the remaining entries (retained only for the

drivers/md/dm-vdo/volume-index.h → drivers/md/dm-vdo/indexer/volume-index.h

@@ -8,10 +8,11 @@
 
 #include <linux/limits.h>
 
+#include "thread-utils.h"
+
 #include "config.h"
 #include "delta-index.h"
 #include "indexer.h"
-#include "thread-utils.h"
 
 /*
  * The volume index is the primary top-level index for UDS. It contains records which map a record

drivers/md/dm-vdo/volume.c → drivers/md/dm-vdo/indexer/volume.c

@@ -9,19 +9,20 @@
 #include <linux/dm-bufio.h>
 #include <linux/err.h>
 
-#include "chapter-index.h"
-#include "config.h"
 #include "errors.h"
-#include "geometry.h"
-#include "hash-utils.h"
-#include "index.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "permassert.h"
-#include "sparse-cache.h"
 #include "string-utils.h"
 #include "thread-utils.h"
 
+#include "chapter-index.h"
+#include "config.h"
+#include "geometry.h"
+#include "hash-utils.h"
+#include "index.h"
+#include "sparse-cache.h"
+
 /*
  * The first block of the volume layout is reserved for the volume header, which is no longer used.
  * The remainder of the volume is divided into chapters consisting of several pages of records, and

drivers/md/dm-vdo/volume.h → drivers/md/dm-vdo/indexer/volume.h

@@ -11,16 +11,17 @@
 #include <linux/dm-bufio.h>
 #include <linux/limits.h>
 
+#include "permassert.h"
+#include "thread-utils.h"
+
 #include "chapter-index.h"
 #include "config.h"
 #include "geometry.h"
 #include "indexer.h"
 #include "index-layout.h"
 #include "index-page-map.h"
-#include "permassert.h"
 #include "radix-sort.h"
 #include "sparse-cache.h"
-#include "thread-utils.h"
 
 /*
  * The volume manages deduplication records on permanent storage. The term "volume" can also refer

drivers/md/dm-vdo/uds-sysfs.c

@@ -9,11 +9,12 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 
-#include "indexer.h"
 #include "logger.h"
 #include "memory-alloc.h"
 #include "string-utils.h"
 
+#include "indexer.h"
+
 #define UDS_SYSFS_NAME "uds"
 
 static struct {