include: move zio_priority_t into zfs.h

It's included so it's effectively already part of it, but it's not
always installed as a userspace header, making zfs.h effectively
useless. Might as well just combine it.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Close openzfs#17066

include/Makefile.am

@@ -150,7 +150,6 @@ COMMON_H = \
 	sys/zio_compress.h \
 	sys/zio_crypt.h \
 	sys/zio_impl.h \
-	sys/zio_priority.h \
 	sys/zrlock.h \
 	sys/zthr.h \
 	\

include/sys/dmu.h

@@ -48,7 +48,6 @@
 #include <sys/cred.h>
 #include <sys/fs/zfs.h>
 #include <sys/zio_compress.h>
-#include <sys/zio_priority.h>
 #include <sys/uio.h>
 #include <sys/zfs_file.h>
 

include/sys/fs/zfs.h

@@ -21,7 +21,7 @@
 
 /*
  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2011, 2024 by Delphix. All rights reserved.
+ * Copyright (c) 2011, 2014, 2016, 2024 by Delphix. All rights reserved.
  * Copyright 2011 Nexenta Systems, Inc.  All rights reserved.
  * Copyright (c) 2013, 2017 Joyent, Inc. All rights reserved.
  * Copyright (c) 2014 Integros [integros.com]
@@ -37,7 +37,6 @@
 #define	_SYS_FS_ZFS_H extern __attribute__((visibility("default")))
 
 #include <sys/time.h>
-#include <sys/zio_priority.h>
 
 #ifdef	__cplusplus
 extern "C" {
@@ -1126,6 +1125,26 @@ typedef enum zio_type {
  */
 #define	ZIO_TYPE_IOCTL	ZIO_TYPE_FLUSH
 
+/*
+ * ZIO priority types. Needed to interpret vdev statistics below.
+ *
+ * NOTE: PLEASE UPDATE THE ENUM STRINGS IN zfs_valstr.c IF YOU ADD ANOTHER
+ * VALUE.
+ */
+typedef enum zio_priority {
+	ZIO_PRIORITY_SYNC_READ,
+	ZIO_PRIORITY_SYNC_WRITE,	/* ZIL */
+	ZIO_PRIORITY_ASYNC_READ,	/* prefetch */
+	ZIO_PRIORITY_ASYNC_WRITE,	/* spa_sync() */
+	ZIO_PRIORITY_SCRUB,		/* asynchronous scrub/resilver reads */
+	ZIO_PRIORITY_REMOVAL,		/* reads/writes for vdev removal */
+	ZIO_PRIORITY_INITIALIZING,	/* initializing I/O */
+	ZIO_PRIORITY_TRIM,		/* trim I/O (discard) */
+	ZIO_PRIORITY_REBUILD,		/* reads/writes for vdev rebuild */
+	ZIO_PRIORITY_NUM_QUEUEABLE,
+	ZIO_PRIORITY_NOW,		/* non-queued i/os (e.g. free) */
+} zio_priority_t;
+
 /*
  * Pool statistics.  Note: all fields should be 64-bit because this
  * is passed between kernel and userland as an nvlist uint64 array.

include/sys/zio.h

@@ -35,7 +35,6 @@
 #ifndef _ZIO_H
 #define	_ZIO_H
 
-#include <sys/zio_priority.h>
 #include <sys/zfs_context.h>
 #include <sys/spa.h>
 #include <sys/txg.h>