[v3,01/10] libmultipath: add sysfs_get_inquiry()

Commit Message

Martin Wilck March 18, 2019, 11:24 a.m. UTC

Provide a utility function to retrieve inquiry data from
sysfs, like we do for VPDs.

Signed-off-by: Martin Wilck <[e-mail]>
---
 libmultipath/discovery.c | 23 ++++++++++++++++++-----
 libmultipath/discovery.h |  6 ++++--
 2 files changed, 22 insertions(+), 7 deletions(-)

Patch

diff --git a/libmultipath/discovery.c b/libmultipath/discovery.c
index 10bd8cd6..65d651d4 100644
--- a/libmultipath/discovery.c
+++ b/libmultipath/discovery.c
@@ -218,12 +218,11 @@  declare_sysfs_get_str(vendor);
 declare_sysfs_get_str(model);
 declare_sysfs_get_str(rev);
 
-ssize_t
-sysfs_get_vpd (struct udev_device * udev, int pg,
-	       unsigned char * buff, size_t len)
+static ssize_t
+sysfs_get_binary (struct udev_device * udev, const char *attrname,
+		  unsigned char *buff, size_t len)
 {
 	ssize_t attr_len;
-	char attrname[9];
 	const char * devname;
 
 	if (!udev) {
@@ -232,7 +231,6 @@  sysfs_get_vpd (struct udev_device * udev, int pg,
 	}
 
 	devname = udev_device_get_sysname(udev);
-	sprintf(attrname, "vpd_pg%02x", pg);
 	attr_len = sysfs_bin_attr_get_value(udev, attrname, buff, len);
 	if (attr_len < 0) {
 		condlog(3, "%s: attribute %s not found in sysfs",
@@ -242,6 +240,21 @@  sysfs_get_vpd (struct udev_device * udev, int pg,
 	return attr_len;
 }
 
+ssize_t sysfs_get_vpd(struct udev_device * udev, unsigned char pg,
+		      unsigned char *buff, size_t len)
+{
+	char attrname[9];
+
+	snprintf(attrname, sizeof(attrname), "vpd_pg%02x", pg);
+	return sysfs_get_binary(udev, attrname, buff, len);
+}
+
+ssize_t sysfs_get_inquiry(struct udev_device * udev,
+			  unsigned char *buff, size_t len)
+{
+	return sysfs_get_binary(udev, "inquiry", buff, len);
+}
+
 int
 sysfs_get_timeout(struct path *pp, unsigned int *timeout)
 {
diff --git a/libmultipath/discovery.h b/libmultipath/discovery.h
index 9aacf75b..7cacbb6c 100644
--- a/libmultipath/discovery.h
+++ b/libmultipath/discovery.h
@@ -48,8 +48,10 @@  int sysfs_get_host_pci_name(const struct path *pp, char *pci_name);
 int sysfs_get_iscsi_ip_address(const struct path *pp, char *ip_address);
 int sysfs_get_host_adapter_name(const struct path *pp,
 				char *adapter_name);
-ssize_t sysfs_get_vpd (struct udev_device * udev, int pg, unsigned char * buff,
-		       size_t len);
+ssize_t sysfs_get_vpd (struct udev_device *udev, unsigned char pg,
+		       unsigned char *buff, size_t len);
+ssize_t sysfs_get_inquiry(struct udev_device *udev,
+			  unsigned char *buff, size_t len);
 int sysfs_get_asymmetric_access_state(struct path *pp,
 				      char *buff, int buflen);
 int get_uid(struct path * pp, int path_state, struct udev_device *udev);