diff mbox series

[v3,03/10] btrfs: zoned: return int from btrfs_check_meta_write_pointer

Message ID 0e8fe9f690ef9aa146df3021fd8a60531693ed0a.1691424260.git.naohiro.aota@wdc.com (mailing list archive)
State New, archived
Headers show
Series btrfs: zoned: write-time activation of metadata block group | expand

Commit Message

Naohiro Aota Aug. 7, 2023, 4:12 p.m. UTC 
Now that we have writeback_control passed to
btrfs_check_meta_write_pointer(), we can move the wbc condition in
submit_eb_page() to btrfs_check_meta_write_pointer() and return int.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
---
 fs/btrfs/extent_io.c | 11 +++--------
 fs/btrfs/zoned.c     | 30 ++++++++++++++++++++++--------
 fs/btrfs/zoned.h     | 10 +++++-----
 3 files changed, 30 insertions(+), 21 deletions(-)
diff mbox series

Patch

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 4a629a7cf478..f6c47e24956a 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -1825,14 +1825,9 @@  static int submit_eb_page(struct page *page, struct btrfs_eb_write_context *ctx)
 
 	ctx->eb = eb;
 
-	if (!btrfs_check_meta_write_pointer(eb->fs_info, ctx)) {
-		/*
-		 * If for_sync, this hole will be filled with
-		 * trasnsaction commit.
-		 */
-		if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)
-			ret = -EAGAIN;
-		else
+	ret = btrfs_check_meta_write_pointer(eb->fs_info, ctx);
+	if (ret) {
+		if (ret == -EBUSY)
 			ret = 0;
 		free_extent_buffer(eb);
 		return ret;
diff --git a/fs/btrfs/zoned.c b/fs/btrfs/zoned.c
index 3a763eb535b0..beaf082c16c0 100644
--- a/fs/btrfs/zoned.c
+++ b/fs/btrfs/zoned.c
@@ -1747,14 +1747,23 @@  void btrfs_finish_ordered_zoned(struct btrfs_ordered_extent *ordered)
 	}
 }
 
-bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
-				    struct btrfs_eb_write_context *ctx)
+/*
+ * Check @ctx->eb is aligned to the write pointer
+ *
+ * Return:
+ *   0: @ctx->eb is at the write pointer. You can write it.
+ *   -EAGAIN: There is a hole. The caller should handle the case.
+ *   -EBUSY: There is a hole, but the caller can just bail out.
+ */
+int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+				   struct btrfs_eb_write_context *ctx)
 {
+	const struct writeback_control *wbc = ctx->wbc;
 	const struct extent_buffer *eb = ctx->eb;
 	struct btrfs_block_group *block_group = ctx->zoned_bg;
 
 	if (!btrfs_is_zoned(fs_info))
-		return true;
+		return 0;
 
 	if (block_group) {
 		if (block_group->start > eb->start ||
@@ -1768,15 +1777,20 @@  bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
 	if (!block_group) {
 		block_group = btrfs_lookup_block_group(fs_info, eb->start);
 		if (!block_group)
-			return true;
+			return 0;
 		ctx->zoned_bg = block_group;
 	}
 
-	if (block_group->meta_write_pointer != eb->start)
-		return false;
-	block_group->meta_write_pointer = eb->start + eb->len;
+	if (block_group->meta_write_pointer == eb->start) {
+		block_group->meta_write_pointer = eb->start + eb->len;
 
-	return true;
+		return 0;
+	}
+
+	/* If for_sync, this hole will be filled with trasnsaction commit. */
+	if (wbc->sync_mode == WB_SYNC_ALL && !wbc->for_sync)
+		return -EAGAIN;
+	return -EBUSY;
 }
 
 void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h
index 49d5bd87245c..c0859d8be152 100644
--- a/fs/btrfs/zoned.h
+++ b/fs/btrfs/zoned.h
@@ -58,8 +58,8 @@  void btrfs_redirty_list_add(struct btrfs_transaction *trans,
 			    struct extent_buffer *eb);
 bool btrfs_use_zone_append(struct btrfs_bio *bbio);
 void btrfs_record_physical_zoned(struct btrfs_bio *bbio);
-bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
-				    struct btrfs_eb_write_context *ctx);
+int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+				   struct btrfs_eb_write_context *ctx);
 void btrfs_revert_meta_write_pointer(struct btrfs_block_group *cache,
 				     struct extent_buffer *eb);
 int btrfs_zoned_issue_zeroout(struct btrfs_device *device, u64 physical, u64 length);
@@ -188,10 +188,10 @@  static inline void btrfs_record_physical_zoned(struct btrfs_bio *bbio)
 {
 }
 
-static inline bool btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
-						  struct btrfs_eb_write_context *ctx)
+static inline int btrfs_check_meta_write_pointer(struct btrfs_fs_info *fs_info,
+						 struct btrfs_eb_write_context *ctx)
 {
-	return true;
+	return 0;
 }
 
 static inline void btrfs_revert_meta_write_pointer(