From: Miquel Sabaté Solà <mssola@mssola.com>
Date: Mon, 16 Feb 2026 00:28:06 +0000 (+0100)
Subject: btrfs: report filesystem shutdown via fserror
X-Git-Tag: v7.1-rc1~231^2~67
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f11c3d855988ce16da14a416832d0b876f44eece;p=thirdparty%2Fkernel%2Flinux.git

btrfs: report filesystem shutdown via fserror

Commit 347b7042fb26 ("Merge patch series "fs: generic file IO error
reporting"") has introduced a common framework for reporting errors to
fsnotify in a standard way.

One of the functions being introduced is fserror_report_shutdown() that,
when combined with the experimental support for shutdown in btrfs, it
means that user-space can also easily detect whenever a btrfs filesystem
has been marked as shutdown.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/fs.h b/fs/btrfs/fs.h
index f2f4d5b747c5b..a4758d94b32e9 100644
--- a/fs/btrfs/fs.h
+++ b/fs/btrfs/fs.h
@@ -27,6 +27,7 @@
 #include <linux/sched.h>
 #include <linux/rbtree.h>
 #include <linux/xxhash.h>
+#include <linux/fserror.h>
 #include <uapi/linux/btrfs.h>
 #include <uapi/linux/btrfs_tree.h>
 #include "extent-io-tree.h"
@@ -1199,8 +1200,10 @@ static inline void btrfs_force_shutdown(struct btrfs_fs_info *fs_info)
 	 * So here we only mark the fs error without flipping it RO.
 	 */
 	WRITE_ONCE(fs_info->fs_error, -EIO);
-	if (!test_and_set_bit(BTRFS_FS_STATE_EMERGENCY_SHUTDOWN, &fs_info->fs_state))
+	if (!test_and_set_bit(BTRFS_FS_STATE_EMERGENCY_SHUTDOWN, &fs_info->fs_state)) {
 		btrfs_crit(fs_info, "emergency shutdown");
+		fserror_report_shutdown(fs_info->sb, GFP_KERNEL);
+	}
 }
 
 /*