[PATCH 10/21] btrfs: move struct scrub_ctx to scrub.h

[Johannes Thumshirn <johannes.thumshirn@wdc.com>]

Move 'struct scrub_ctx' to the newly created scrub.h file.

This is a preparation step for moving zoned only code from scrub.c to
zoned.c.

Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
---
 fs/btrfs/scrub.c | 44 +----------------------------------------
 fs/btrfs/scrub.h | 51 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 52 insertions(+), 43 deletions(-)
 create mode 100644 fs/btrfs/scrub.h

diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 70cf1f487748c..a2c42ff544701 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -21,6 +21,7 @@
 #include "raid56.h"
 #include "block-group.h"
 #include "zoned.h"
+#include "scrub.h"
 
 /*
  * This is only the first step towards a full-features scrub. It reads all
@@ -46,7 +47,6 @@ struct scrub_ctx;
  */
 #define SCRUB_PAGES_PER_RD_BIO	32	/* 128k per bio */
 #define SCRUB_PAGES_PER_WR_BIO	32	/* 128k per bio */
-#define SCRUB_BIOS_PER_SCTX	64	/* 8MB per device in flight */
 
 /*
  * the following value times PAGE_SIZE needs to be large enough to match the
@@ -151,48 +151,6 @@ struct scrub_parity {
 	unsigned long		bitmap[];
 };
 
-struct scrub_ctx {
-	struct scrub_bio	*bios[SCRUB_BIOS_PER_SCTX];
-	struct btrfs_fs_info	*fs_info;
-	int			first_free;
-	int			curr;
-	atomic_t		bios_in_flight;
-	atomic_t		workers_pending;
-	spinlock_t		list_lock;
-	wait_queue_head_t	list_wait;
-	struct list_head	csum_list;
-	atomic_t		cancel_req;
-	int			readonly;
-	int			pages_per_rd_bio;
-
-	/* State of IO submission throttling affecting the associated device */
-	ktime_t			throttle_deadline;
-	u64			throttle_sent;
-
-	int			is_dev_replace;
-	u64			write_pointer;
-
-	struct scrub_bio        *wr_curr_bio;
-	struct mutex            wr_lock;
-	int                     pages_per_wr_bio; /* <= SCRUB_PAGES_PER_WR_BIO */
-	struct btrfs_device     *wr_tgtdev;
-	bool                    flush_all_writes;
-
-	/*
-	 * statistics
-	 */
-	struct btrfs_scrub_progress stat;
-	spinlock_t		stat_lock;
-
-	/*
-	 * Use a ref counter to avoid use-after-free issues. Scrub workers
-	 * decrement bios_in_flight and workers_pending and then do a wakeup
-	 * on the list_wait wait queue. We must ensure the main scrub task
-	 * doesn't free the scrub context before or while the workers are
-	 * doing the wakeup() call.
-	 */
-	refcount_t              refs;
-};
 
 struct scrub_warning {
 	struct btrfs_path	*path;
diff --git a/fs/btrfs/scrub.h b/fs/btrfs/scrub.h
new file mode 100644
index 0000000000000..3eb8c8905c902
--- /dev/null
+++ b/fs/btrfs/scrub.h
@@ -0,0 +1,51 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef BTRFS_SCRUB_H
+#define BTRFS_SCRUB_H
+
+#define SCRUB_BIOS_PER_SCTX	64	/* 8MB per device in flight */
+
+struct scrub_ctx {
+	struct scrub_bio	*bios[SCRUB_BIOS_PER_SCTX];
+	struct btrfs_fs_info	*fs_info;
+	int			first_free;
+	int			curr;
+	atomic_t		bios_in_flight;
+	atomic_t		workers_pending;
+	spinlock_t		list_lock;
+	wait_queue_head_t	list_wait;
+	struct list_head	csum_list;
+	atomic_t		cancel_req;
+	int			readonly;
+	int			pages_per_rd_bio;
+
+	/* State of IO submission throttling affecting the associated device */
+	ktime_t			throttle_deadline;
+	u64			throttle_sent;
+
+	int			is_dev_replace;
+	u64			write_pointer;
+
+	struct scrub_bio        *wr_curr_bio;
+	struct mutex            wr_lock;
+	int                     pages_per_wr_bio; /* <= SCRUB_PAGES_PER_WR_BIO */
+	struct btrfs_device     *wr_tgtdev;
+	bool                    flush_all_writes;
+
+	/*
+	 * statistics
+	 */
+	struct btrfs_scrub_progress stat;
+	spinlock_t		stat_lock;
+
+	/*
+	 * Use a ref counter to avoid use-after-free issues. Scrub workers
+	 * decrement bios_in_flight and workers_pending and then do a wakeup
+	 * on the list_wait wait queue. We must ensure the main scrub task
+	 * doesn't free the scrub context before or while the workers are
+	 * doing the wakeup() call.
+	 */
+	refcount_t              refs;
+};
+
+#endif /* BTRFS_SCRUB_H */
-- 
2.31.1