[PATCH v2 15/18] btrfs: move the device specific mount options to super.c

[Josef Bacik <josef@toxicpanda.com>]

We add these mount options based on the fs_devices settings, which can
be set once we've opened the fs_devices.  Move these into their own
helper and call it from get_tree_super.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
---
 fs/btrfs/disk-io.c | 23 -----------------------
 fs/btrfs/super.c   | 25 +++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 23 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index ce861f4baf47..50ed7ece0840 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3483,29 +3483,6 @@ int __cold open_ctree(struct super_block *sb, struct btrfs_fs_devices *fs_device
 		goto fail_cleaner;
 	}
 
-	if (!btrfs_test_opt(fs_info, NOSSD) &&
-	    !fs_info->fs_devices->rotating) {
-		btrfs_set_and_info(fs_info, SSD, "enabling ssd optimizations");
-	}
-
-	/*
-	 * For devices supporting discard turn on discard=async automatically,
-	 * unless it's already set or disabled. This could be turned off by
-	 * nodiscard for the same mount.
-	 *
-	 * The zoned mode piggy backs on the discard functionality for
-	 * resetting a zone. There is no reason to delay the zone reset as it is
-	 * fast enough. So, do not enable async discard for zoned mode.
-	 */
-	if (!(btrfs_test_opt(fs_info, DISCARD_SYNC) ||
-	      btrfs_test_opt(fs_info, DISCARD_ASYNC) ||
-	      btrfs_test_opt(fs_info, NODISCARD)) &&
-	    fs_info->fs_devices->discardable &&
-	    !btrfs_is_zoned(fs_info)) {
-		btrfs_set_and_info(fs_info, DISCARD_ASYNC,
-				   "auto enabling async discard");
-	}
-
 	ret = btrfs_read_qgroup_config(fs_info);
 	if (ret)
 		goto fail_trans_kthread;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 4ce07d255497..c6c2bd407f90 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -823,6 +823,29 @@ void btrfs_set_free_space_cache_settings(struct btrfs_fs_info *fs_info)
 		btrfs_set_opt(fs_info->mount_opt, SPACE_CACHE);
 }
 
+static void set_device_specific_options(struct btrfs_fs_info *fs_info)
+{
+	if (!btrfs_test_opt(fs_info, NOSSD) &&
+	    !fs_info->fs_devices->rotating)
+		btrfs_set_opt(fs_info->mount_opt, SSD);
+
+	/*
+	 * For devices supporting discard turn on discard=async automatically,
+	 * unless it's already set or disabled. This could be turned off by
+	 * nodiscard for the same mount.
+	 *
+	 * The zoned mode piggy backs on the discard functionality for
+	 * resetting a zone. There is no reason to delay the zone reset as it is
+	 * fast enough. So, do not enable async discard for zoned mode.
+	 */
+	if (!(btrfs_test_opt(fs_info, DISCARD_SYNC) ||
+	      btrfs_test_opt(fs_info, DISCARD_ASYNC) ||
+	      btrfs_test_opt(fs_info, NODISCARD)) &&
+	    fs_info->fs_devices->discardable &&
+	    !btrfs_is_zoned(fs_info))
+		btrfs_set_opt(fs_info->mount_opt, DISCARD_ASYNC);
+}
+
 static int parse_rescue_options(struct btrfs_fs_info *info, const char *options)
 {
 	char *opts;
@@ -2913,6 +2936,8 @@ static int btrfs_get_tree_super(struct fs_context *fc)
 		goto error;
 	}
 
+	set_device_specific_options(fs_info);
+
 	if (s->s_root) {
 		btrfs_close_devices(fs_devices);
 		if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY)
-- 
2.41.0