Obtain the ana_state attribute from the kernel and
use it to display information about path state and
"priority" of native NVMe multipath.
Signed-off-by: Martin Wilck <mwilck@xxxxxxxx>
---
libmultipath/foreign/nvme.c | 43 +++++++++++++++++++++++++++++++------
1 file changed, 36 insertions(+), 7 deletions(-)
diff --git a/libmultipath/foreign/nvme.c b/libmultipath/foreign/nvme.c
index 11849889..bda9bcc4 100644
--- a/libmultipath/foreign/nvme.c
+++ b/libmultipath/foreign/nvme.c
@@ -204,12 +204,6 @@ nvme_pg_rel_paths(const struct gen_pathgroup *gpg, const struct _vector *v)
/* empty */
}
-static int snprint_nvme_pg(const struct gen_pathgroup *gmp,
- char *buff, int len, char wildcard)
-{
- return snprintf(buff, len, N_A);
-}
-
static int snprint_hcil(const struct nvme_path *np, char *buf, int len)
{
unsigned int nvmeid, ctlid, nsid;
@@ -249,6 +243,23 @@ static int snprint_nvme_path(const struct gen_path *gp,
case 'o':
sysfs_attr_get_value(np->ctl, "state", fld, sizeof(fld));
return snprintf(buff, len, "%s", fld);
+ case 'T':
+ if (sysfs_attr_get_value(np->udev, "ana_state", fld,
+ sizeof(fld)) > 0)
+ return snprintf(buff, len, "%s", fld);
+ break;
+ case 'p':
+ if (sysfs_attr_get_value(np->udev, "ana_state", fld,
+ sizeof(fld)) > 0) {
+ rstrip(fld);
+ if (!strcmp(fld, "optimized"))
+ return snprintf(buff, len, "%d", 50);
+ else if (!strcmp(fld, "non-optimized"))
+ return snprintf(buff, len, "%d", 10);
+ else
+ return snprintf(buff, len, "%d", 0);
+ }
+ break;
case 's':
snprintf(fld, sizeof(fld), "%s",
udev_device_get_sysattr_value(np->ctl,
@@ -286,12 +297,30 @@ static int snprint_nvme_path(const struct gen_path *gp,
udev_device_get_sysname(pci));
/* fall through */
default:
- return snprintf(buff, len, "%s", N_A);
break;
}
+ return snprintf(buff, len, "%s", N_A);
return 0;
}
+static int snprint_nvme_pg(const struct gen_pathgroup *gmp,
+ char *buff, int len, char wildcard)
+{
+ const struct nvme_pathgroup *pg = const_gen_pg_to_nvme(gmp);
+ const struct nvme_path *path = nvme_pg_to_path(pg);
+
+ switch (wildcard) {
+ case 't':
+ return snprint_nvme_path(nvme_path_to_gen(path),
+ buff, len, 'T');
+ case 'p':
+ return snprint_nvme_path(nvme_path_to_gen(path),
+ buff, len, 'p');
+ default:
+ return snprintf(buff, len, N_A);
+ }
+}
+
static int nvme_style(const struct gen_multipath* gm,
char *buf, int len, int verbosity)
{
--
2.19.2
--
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