[PATCH v4 2/2] nvme-multipath: document path_state sysfs attribute

[Guixin Liu <kanie@linux.alibaba.com>]

Document the newly added /sys/block/nvmeXcYnZ/path_state attribute in
the stable NVMe sysfs ABI file, describing the possible path states and
their meaning.

Signed-off-by: Guixin Liu <kanie@linux.alibaba.com>
---
 Documentation/ABI/stable/sysfs-nvme | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/Documentation/ABI/stable/sysfs-nvme b/Documentation/ABI/stable/sysfs-nvme
index a2f5d0710db4..04bcea5bae45 100644
--- a/Documentation/ABI/stable/sysfs-nvme
+++ b/Documentation/ABI/stable/sysfs-nvme
@@ -326,6 +326,27 @@ Description:
 		currently selected path. Returns empty if iopolicy is not
 		"numa". Requires CONFIG_NVME_MULTIPATH.
 
+What:		/sys/block/nvmeXcYnZ/path_state
+Date:		July 2026
+KernelVersion:	7.2
+Contact:	Guixin Liu <kanie@linux.alibaba.com>
+Description:
+		Shows the current multipath path state for this namespace
+		path device. Possible values:
+
+		"enabled": the path is usable for I/O.
+
+		"ctrl-down": the path is disabled because the controller
+		is not live.
+
+		"ana-pending": the path is disabled because an ANA state
+		change is pending.
+
+		"ns-not-ready": the path is disabled because the namespace
+		is not ready.
+
+		Requires CONFIG_NVME_MULTIPATH.
+
 What:		/sys/block/nvmeXnY/delayed_removal_secs
 Date:		May 2025
 KernelVersion:	6.16
-- 
2.43.7