[PATCH v2 1/3] btrfs: move the full read-only helper to fs.h

The global block reserve code needs to determine whether a filesystem is
fully read-only. Move fs_is_full_ro() from disk-io.c to fs.h and rename it
to btrfs_is_full_ro() so that it can be shared.

No functional change.

Signed-off-by: Dongjiang Zhu <[email protected]>
---
 fs/btrfs/disk-io.c | 11 +----------
 fs/btrfs/fs.h      |  9 +++++++++
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 52593423bdc3..acff40469589 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3287,15 +3287,6 @@ int btrfs_check_features(struct btrfs_fs_info *fs_info, bool is_rw_mount)
 	return 0;
 }
 
-static bool fs_is_full_ro(const struct btrfs_fs_info *fs_info)
-{
-	if (!sb_rdonly(fs_info->sb))
-		return false;
-	if (unlikely(fs_info->mount_opt & BTRFS_MOUNT_FULL_RO_MASK))
-		return true;
-	return false;
-}
-
 /*
  * Try to wait for any metadata readahead, and invalidate all btree folios.
  *
@@ -3460,7 +3451,7 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
 		WRITE_ONCE(fs_info->fs_error, -EUCLEAN);
 
 	/* If the fs has any rescue options, no transaction is allowed. */
-	if (fs_is_full_ro(fs_info))
+	if (btrfs_is_full_ro(fs_info))
 		WRITE_ONCE(fs_info->fs_error, -EROFS);
 
 	/* Set up fs_info before parsing mount options */
diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h
index cffb9197a1ab..d3f74453b356 100644
--- a/fs/btrfs/fs.h
+++ b/fs/btrfs/fs.h
@@ -1159,6 +1159,15 @@ void __btrfs_clear_fs_compat_ro(struct btrfs_fs_info *fs_info, u64 flag,
 #define btrfs_test_opt(fs_info, opt)	((fs_info)->mount_opt & \
 					 BTRFS_MOUNT_##opt)
 
+static inline bool btrfs_is_full_ro(const struct btrfs_fs_info *fs_info)
+{
+	if (!sb_rdonly(fs_info->sb))
+		return false;
+	if (unlikely(fs_info->mount_opt & BTRFS_MOUNT_FULL_RO_MASK))
+		return true;
+	return false;
+}
+
 static inline bool btrfs_fs_closing(const struct btrfs_fs_info *fs_info)
 {
 	return unlikely(test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags));
-- 
2.39.5