xfs: report fs metadata errors via fsnotify

Report filesystem corruption problems to the fserror helpers so that
fsnotify can also convey metadata problems to userspace.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://patch.msgid.link/176826402652.3490369.2609467634858507969.stgit@frogsfrogsfrogs
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: Darrick J. Wong

fs/xfs/xfs_fsops.c

@@ -26,6 +26,8 @@
 #include "xfs_rtrefcount_btree.h"
 #include "xfs_metafile.h"
 
+#include <linux/fserror.h>
+
 /*
  * Write new AG headers to disk. Non-transactional, but need to be
  * written and completed prior to the growfs transaction being logged.
@@ -540,6 +542,8 @@ xfs_do_force_shutdown(
 		"Please unmount the filesystem and rectify the problem(s)");
 	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)
 		xfs_stack_trace();
+
+	fserror_report_shutdown(mp->m_super, GFP_KERNEL);
 }
 
 /*

fs/xfs/xfs_health.c

@@ -20,6 +20,8 @@
 #include "xfs_quota_defs.h"
 #include "xfs_rtgroup.h"
 
+#include <linux/fserror.h>
+
 static void
 xfs_health_unmount_group(
 	struct xfs_group	*xg,
@@ -111,6 +113,8 @@ xfs_fs_mark_sick(
 	spin_lock(&mp->m_sb_lock);
 	mp->m_fs_sick |= mask;
 	spin_unlock(&mp->m_sb_lock);
+
+	fserror_report_metadata(mp->m_super, -EFSCORRUPTED, GFP_NOFS);
 }
 
 /* Mark per-fs metadata as having been checked and found unhealthy by fsck. */
@@ -126,6 +130,8 @@ xfs_fs_mark_corrupt(
 	mp->m_fs_sick |= mask;
 	mp->m_fs_checked |= mask;
 	spin_unlock(&mp->m_sb_lock);
+
+	fserror_report_metadata(mp->m_super, -EFSCORRUPTED, GFP_NOFS);
 }
 
 /* Mark a per-fs metadata healed. */
@@ -198,6 +204,8 @@ xfs_group_mark_sick(
 	spin_lock(&xg->xg_state_lock);
 	xg->xg_sick |= mask;
 	spin_unlock(&xg->xg_state_lock);
+
+	fserror_report_metadata(xg->xg_mount->m_super, -EFSCORRUPTED, GFP_NOFS);
 }
 
 /*
@@ -215,6 +223,8 @@ xfs_group_mark_corrupt(
 	xg->xg_sick |= mask;
 	xg->xg_checked |= mask;
 	spin_unlock(&xg->xg_state_lock);
+
+	fserror_report_metadata(xg->xg_mount->m_super, -EFSCORRUPTED, GFP_NOFS);
 }
 
 /*
@@ -287,6 +297,8 @@ xfs_inode_mark_sick(
 	spin_lock(&VFS_I(ip)->i_lock);
 	inode_state_clear(VFS_I(ip), I_DONTCACHE);
 	spin_unlock(&VFS_I(ip)->i_lock);
+
+	fserror_report_file_metadata(VFS_I(ip), -EFSCORRUPTED, GFP_NOFS);
 }
 
 /* Mark inode metadata as having been checked and found unhealthy by fsck. */
@@ -311,6 +323,8 @@ xfs_inode_mark_corrupt(
 	spin_lock(&VFS_I(ip)->i_lock);
 	inode_state_clear(VFS_I(ip), I_DONTCACHE);
 	spin_unlock(&VFS_I(ip)->i_lock);
+
+	fserror_report_file_metadata(VFS_I(ip), -EFSCORRUPTED, GFP_NOFS);
 }
 
 /* Mark parts of an inode healed. */