[2/7] xfs: create hooks for monitoring health updates

Commit Message

Darrick J. Wong Feb. 24, 2024, 1:34 a.m. UTC

From: Darrick J. Wong <[e-mail]>

Create hooks for monitoring health events.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 libxfs/xfs_health.h |   48 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

Patch

diff --git a/libxfs/xfs_health.h b/libxfs/xfs_health.h
index 89b80e957917..3c508a71ec91 100644
--- a/libxfs/xfs_health.h
+++ b/libxfs/xfs_health.h
@@ -331,4 +331,52 @@  void xfs_bulkstat_health(struct xfs_inode *ip, struct xfs_bulkstat *bs);
 #define xfs_metadata_is_sick(error) \
 	(unlikely((error) == -EFSCORRUPTED || (error) == -EFSBADCRC))
 
+/*
+ * Parameters for tracking health updates.  The enum below is passed as the
+ * hook function argument.
+ */
+enum xfs_health_update_type {
+	XFS_HEALTHUP_SICK = 1,	/* runtime corruption observed */
+	XFS_HEALTHUP_CORRUPT,	/* fsck reported corruption */
+	XFS_HEALTHUP_HEALTHY,	/* fsck reported healthy structure */
+	XFS_HEALTHUP_UNMOUNT,	/* filesystem is unmounting */
+};
+
+/* Where in the filesystem was the event observed? */
+enum xfs_health_update_domain {
+	XFS_HEALTHUP_FS = 1,	/* main filesystem */
+	XFS_HEALTHUP_RT,	/* realtime */
+	XFS_HEALTHUP_AG,	/* allocation group */
+	XFS_HEALTHUP_INODE,	/* inode */
+	XFS_HEALTHUP_RTGROUP,	/* realtime group */
+};
+
+struct xfs_health_update_params {
+	/* XFS_HEALTHUP_INODE */
+	xfs_ino_t			ino;
+	uint32_t			gen;
+
+	/* XFS_HEALTHUP_AG/RTGROUP */
+	uint32_t			group;
+
+	/* XFS_SICK_* flags */
+	unsigned int			old_mask;
+	unsigned int			new_mask;
+
+	enum xfs_health_update_domain	domain;
+};
+
+#ifdef CONFIG_XFS_LIVE_HOOKS
+struct xfs_health_hook {
+	struct xfs_hook			health_hook;
+};
+
+void xfs_health_hook_disable(void);
+void xfs_health_hook_enable(void);
+
+int xfs_health_hook_add(struct xfs_mount *mp, struct xfs_health_hook *hook);
+void xfs_health_hook_del(struct xfs_mount *mp, struct xfs_health_hook *hook);
+void xfs_health_hook_setup(struct xfs_health_hook *hook, notifier_fn_t mod_fn);
+#endif /* CONFIG_XFS_LIVE_HOOKS */
+
 #endif	/* __XFS_HEALTH_H__ */