libblkid: topology: probe diskseq

8 files changed, 36 insertions, 1 deletions

diff --git a/libblkid/docs/libblkid-sections.txt b/libblkid/docs/libblkid-sections.txt
index d54cf66e0..929700253 100644
--- a/libblkid/docs/libblkid-sections.txt
+++ b/libblkid/docs/libblkid-sections.txt
@@ -151,6 +151,7 @@ blkid_probe_enable_topology
 blkid_probe_get_topology
 blkid_topology_get_alignment_offset
 blkid_topology_get_dax
+blkid_topology_get_diskseq
 blkid_topology_get_logical_sector_size
 blkid_topology_get_minimum_io_size
 blkid_topology_get_optimal_io_size
diff --git a/libblkid/samples/topology.c b/libblkid/samples/topology.c
index 7d21567d5..8dfb9c5bb 100644
--- a/libblkid/samples/topology.c
+++ b/libblkid/samples/topology.c
@@ -11,6 +11,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <errno.h>
+#include <inttypes.h>
 
 #include <blkid.h>
 
@@ -53,6 +54,8 @@ int main(int argc, char *argv[])
 				blkid_topology_get_physical_sector_size(tp));
 		printf("\tdax support          : %lu\n",
 				blkid_topology_get_dax(tp));
+		printf("\tdiskseq              : %"PRId64"\n",
+				blkid_topology_get_diskseq(tp));
 	}
 
 	/*
diff --git a/libblkid/src/blkid.h.in b/libblkid/src/blkid.h.in
index 6132cb8a1..c232d72fd 100644
--- a/libblkid/src/blkid.h.in
+++ b/libblkid/src/blkid.h.in
@@ -333,6 +333,8 @@ extern unsigned long blkid_topology_get_physical_sector_size(blkid_topology tp)
 			__ul_attribute__((nonnull));
 extern unsigned long blkid_topology_get_dax(blkid_topology tp)
 			__ul_attribute__((nonnull));
+extern uint64_t blkid_topology_get_diskseq(blkid_topology tp)
+			__ul_attribute__((nonnull));
 
 /*
  * partitions probing
diff --git a/libblkid/src/libblkid.sym b/libblkid/src/libblkid.sym
index 366f2c0c0..775b0246c 100644
--- a/libblkid/src/libblkid.sym
+++ b/libblkid/src/libblkid.sym
@@ -183,3 +183,7 @@ BLKID_2_37 {
 	blkid_probe_set_hint;
 	blkid_probe_reset_hints;
 } BLKID_2_36;
+
+BLKID_2_39 {
+	blkid_topology_get_diskseq;
+} BLKID_2_37;
diff --git a/libblkid/src/topology/ioctl.c b/libblkid/src/topology/ioctl.c
index 3aba09e4f..0603eb912 100644
--- a/libblkid/src/topology/ioctl.c
+++ b/libblkid/src/topology/ioctl.c
@@ -33,7 +33,8 @@ static struct topology_val {
 	{ BLKALIGNOFF, NULL, blkid_topology_set_alignment_offset },
 	{ BLKIOMIN, blkid_topology_set_minimum_io_size },
 	{ BLKIOOPT, blkid_topology_set_optimal_io_size },
-	{ BLKPBSZGET, blkid_topology_set_physical_sector_size }
+	{ BLKPBSZGET, blkid_topology_set_physical_sector_size },
+	{ BLKGETDISKSEQ, blkid_topology_set_diskseq },
 	/* we read BLKSSZGET in topology.c */
 };
 
diff --git a/libblkid/src/topology/sysfs.c b/libblkid/src/topology/sysfs.c
index 745cd115a..fe13f940f 100644
--- a/libblkid/src/topology/sysfs.c
+++ b/libblkid/src/topology/sysfs.c
@@ -38,6 +38,7 @@ static struct topology_val {
 	{ "queue/optimal_io_size", blkid_topology_set_optimal_io_size },
 	{ "queue/physical_block_size", blkid_topology_set_physical_sector_size },
 	{ "queue/dax", blkid_topology_set_dax },
+	{ "diskseq", blkid_topology_set_diskseq },
 };
 
 static int probe_sysfs_tp(blkid_probe pr,
diff --git a/libblkid/src/topology/topology.c b/libblkid/src/topology/topology.c
index d638c4c20..d34e7a0bb 100644
--- a/libblkid/src/topology/topology.c
+++ b/libblkid/src/topology/topology.c
@@ -68,6 +68,7 @@ struct blkid_struct_topology {
 	unsigned long	logical_sector_size;
 	unsigned long	physical_sector_size;
 	unsigned long   dax;
+	uint64_t	diskseq;
 };
 
 /*
@@ -312,6 +313,14 @@ int blkid_topology_set_dax(blkid_probe pr, unsigned long val)
 			val);
 }
 
+int blkid_topology_set_diskseq(blkid_probe pr, uint64_t val)
+{
+	return topology_set_value(pr,
+			"DISKSEQ",
+			offsetof(struct blkid_struct_topology, diskseq),
+			val);
+}
+
 /**
  * blkid_topology_get_alignment_offset:
  * @tp: topology
@@ -379,3 +388,16 @@ unsigned long blkid_topology_get_dax(blkid_topology tp)
 {
 	return tp->dax;
 }
+
+/**
+ * blkid_topology_get_diskseq
+ * @tp: topology
+ *
+ * Returns: disk sequence number
+ *
+ * Since: 2.39
+ */
+uint64_t blkid_topology_get_diskseq(blkid_topology tp)
+{
+	return tp->diskseq;
+}
diff --git a/libblkid/src/topology/topology.h b/libblkid/src/topology/topology.h
index 3e46af9ac..9810fe46b 100644
--- a/libblkid/src/topology/topology.h
+++ b/libblkid/src/topology/topology.h
@@ -8,6 +8,7 @@ extern int blkid_topology_set_minimum_io_size(blkid_probe pr, unsigned long val)
 extern int blkid_topology_set_optimal_io_size(blkid_probe pr, unsigned long val);
 extern int blkid_topology_set_physical_sector_size(blkid_probe pr, unsigned long val);
 extern int blkid_topology_set_dax(blkid_probe pr, unsigned long val);
+extern int blkid_topology_set_diskseq(blkid_probe pr, uint64_t val);
 
 /*
  * topology probers