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ndctl/0129-ndctl-libndctl-Update-nvdimm-flags-after-smart-injec.patch

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From c5ccbf29c54b5a3d9cb1c138c06c8d5ac3ee80c2 Mon Sep 17 00:00:00 2001
From: Vaibhav Jain <vaibhav@linux.ibm.com>
Date: Tue, 22 Feb 2022 17:45:19 +0530
Subject: [PATCH 129/217] ndctl,libndctl: Update nvdimm flags after
smart-inject
Presently after performing an inject-smart command the nvdimm flags reported are
out of date as shown below where no 'smart_notify' or 'flush_fail' flags were
reported even though they are set after injecting the smart error:
$ sudo ndctl inject-smart -fU nmem0
[
{
"dev":"nmem0",
"health":{
"health_state":"fatal",
"shutdown_state":"dirty",
"shutdown_count":0
}
}
]
$ sudo cat /sys/class/nd/ndctl0/device/nmem0/papr/flags
flush_fail smart_notify
This happens because nvdimm flags are only parsed once during its probe
and not refreshed even after a inject-smart operation makes them out of
date. To fix this the patch forces an update of nvdimm flags via newly
introduced export from libndctl named ndctl_dimm_refresh_flags() thats called
from dimm_inject_smart() after inject-smart command is successfully
submitted. This ensures that correct nvdimm flags are displayed later in that
function. With this implemented correct nvdimm flags are reported after a
inject-smart operation:
$ sudo ndctl inject-smart -fU nmem0
[
{
"dev":"nmem0",
"flag_failed_flush":true,
"flag_smart_event":true,
"health":{
"health_state":"fatal",
"shutdown_state":"dirty",
"shutdown_count":0
}
}
]
The patch refactors populate_dimm_attributes() to move the nvdimm flags
parsing code to the newly introduced ndctl_dimm_refresh_flags()
export. Since reading nvdimm flags requires constructing path using
'bus_prefix' which is only available during add_dimm(), the patch
introduces a new member 'struct ndctl_dimm.bus_prefix' to cache its
value. During ndctl_dimm_refresh_flags() the cached bus_prefix is used to
read the contents of the nvdimm flag file and pass it on to the appropriate
flag parsing function. Finally dimm_inject_smart() is updated to issue call to
ndctl_dimm_refresh_flags() before generating json output of the nvdimm status
Link: https://lore.kernel.org/r/20220222121519.1674117-1-vaibhav@linux.ibm.com
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
---
ndctl/inject-smart.c | 4 +++
ndctl/lib/libndctl.c | 55 +++++++++++++++++++++++++++++++-----------
ndctl/lib/libndctl.sym | 4 +++
ndctl/lib/private.h | 1 +
ndctl/libndctl.h | 1 +
5 files changed, 51 insertions(+), 14 deletions(-)
diff -up ndctl-71.1/ndctl/inject-smart.c.orig ndctl-71.1/ndctl/inject-smart.c
--- ndctl-71.1/ndctl/inject-smart.c.orig 2022-10-07 16:40:24.610615979 -0400
+++ ndctl-71.1/ndctl/inject-smart.c 2022-10-07 16:40:35.031651459 -0400
@@ -467,6 +467,10 @@ static int dimm_inject_smart(struct ndct
jdimms = json_object_new_array();
if (!jdimms)
goto out;
+
+ /* Ensure the dimm flags are upto date before reporting them */
+ ndctl_dimm_refresh_flags(dimm);
+
jdimm = util_dimm_to_json(dimm, sctx.flags);
if (!jdimm)
goto out;
diff -up ndctl-71.1/ndctl/lib/libndctl.c.orig ndctl-71.1/ndctl/lib/libndctl.c
--- ndctl-71.1/ndctl/lib/libndctl.c.orig 2022-10-07 16:40:24.608615972 -0400
+++ ndctl-71.1/ndctl/lib/libndctl.c 2022-10-07 16:40:35.032651462 -0400
@@ -588,6 +588,7 @@ static void free_dimm(struct ndctl_dimm
free(dimm->unique_id);
free(dimm->dimm_buf);
free(dimm->dimm_path);
+ free(dimm->bus_prefix);
if (dimm->module)
kmod_module_unref(dimm->module);
if (dimm->health_eventfd > -1)
@@ -1645,14 +1646,34 @@ static enum ndctl_fwa_result fwa_result_
return NDCTL_FWA_RESULT_INVALID;
}
+NDCTL_EXPORT void ndctl_dimm_refresh_flags(struct ndctl_dimm *dimm)
+{
+ struct ndctl_ctx *ctx = dimm->bus->ctx;
+ char *path = dimm->dimm_buf;
+ char buf[SYSFS_ATTR_SIZE];
+
+ /* Construct path to dimm flags sysfs file */
+ sprintf(path, "%s/%s/flags", dimm->dimm_path, dimm->bus_prefix);
+
+ if (sysfs_read_attr(ctx, path, buf) < 0)
+ return;
+
+ /* Reset the flags */
+ dimm->flags.flags = 0;
+ if (ndctl_bus_has_nfit(dimm->bus))
+ parse_nfit_mem_flags(dimm, buf);
+ else if (ndctl_bus_is_papr_scm(dimm->bus))
+ parse_papr_flags(dimm, buf);
+}
+
static int populate_dimm_attributes(struct ndctl_dimm *dimm,
- const char *dimm_base,
- const char *bus_prefix)
+ const char *dimm_base)
{
int i, rc = -1;
char buf[SYSFS_ATTR_SIZE];
struct ndctl_ctx *ctx = dimm->bus->ctx;
char *path = calloc(1, strlen(dimm_base) + 100);
+ const char *bus_prefix = dimm->bus_prefix;
if (!path)
return -ENOMEM;
@@ -1736,16 +1757,10 @@ static int populate_dimm_attributes(stru
}
sprintf(path, "%s/%s/flags", dimm_base, bus_prefix);
- if (sysfs_read_attr(ctx, path, buf) == 0) {
- if (ndctl_bus_has_nfit(dimm->bus))
- parse_nfit_mem_flags(dimm, buf);
- else if (ndctl_bus_is_papr_scm(dimm->bus)) {
- dimm->cmd_family = NVDIMM_FAMILY_PAPR;
- parse_papr_flags(dimm, buf);
- }
- }
-
dimm->health_eventfd = open(path, O_RDONLY|O_CLOEXEC);
+
+ ndctl_dimm_refresh_flags(dimm);
+
rc = 0;
err_read:
@@ -1801,8 +1816,9 @@ static int add_papr_dimm(struct ndctl_di
rc = 0;
} else if (strcmp(buf, "nvdimm_test") == 0) {
+ dimm->cmd_family = NVDIMM_FAMILY_PAPR;
/* probe via common populate_dimm_attributes() */
- rc = populate_dimm_attributes(dimm, dimm_base, "papr");
+ rc = populate_dimm_attributes(dimm, dimm_base);
}
out:
free(path);
@@ -1899,9 +1915,20 @@ static void *add_dimm(void *parent, int
dimm->formats = formats;
/* Check if the given dimm supports nfit */
if (ndctl_bus_has_nfit(bus)) {
- rc = populate_dimm_attributes(dimm, dimm_base, "nfit");
+ dimm->bus_prefix = strdup("nfit");
+ if (!dimm->bus_prefix) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ rc = populate_dimm_attributes(dimm, dimm_base);
+
} else if (ndctl_bus_has_of_node(bus)) {
- rc = add_papr_dimm(dimm, dimm_base);
+ dimm->bus_prefix = strdup("papr");
+ if (!dimm->bus_prefix) {
+ rc = -ENOMEM;
+ goto out;
+ }
+ rc = add_papr_dimm(dimm, dimm_base);
}
if (rc == -ENODEV) {
diff -up ndctl-71.1/ndctl/lib/libndctl.sym.orig ndctl-71.1/ndctl/lib/libndctl.sym
--- ndctl-71.1/ndctl/lib/libndctl.sym.orig 2022-10-07 16:40:24.344615073 -0400
+++ ndctl-71.1/ndctl/lib/libndctl.sym 2022-10-07 16:40:35.032651462 -0400
@@ -456,3 +456,7 @@ LIBNDCTL_26 {
ndctl_bus_nfit_translate_spa;
ndctl_dimm_sizeof_namespace_index;
} LIBNDCTL_25;
+
+LIBNDCTL_27 {
+ ndctl_dimm_refresh_flags;
+} LIBNDCTL_26;
diff -up ndctl-71.1/ndctl/lib/private.h.orig ndctl-71.1/ndctl/lib/private.h
--- ndctl-71.1/ndctl/lib/private.h.orig 2022-10-07 16:40:24.455615451 -0400
+++ ndctl-71.1/ndctl/lib/private.h 2022-10-07 16:40:35.032651462 -0400
@@ -75,6 +75,7 @@ struct ndctl_dimm {
char *unique_id;
char *dimm_path;
char *dimm_buf;
+ char *bus_prefix;
int health_eventfd;
int buf_len;
int id;
diff -up ndctl-71.1/ndctl/libndctl.h.orig ndctl-71.1/ndctl/libndctl.h
--- ndctl-71.1/ndctl/libndctl.h.orig 2022-10-07 16:40:24.611615982 -0400
+++ ndctl-71.1/ndctl/libndctl.h 2022-10-07 16:40:35.033651466 -0400
@@ -221,6 +221,7 @@ int ndctl_dimm_is_active(struct ndctl_di
int ndctl_dimm_is_enabled(struct ndctl_dimm *dimm);
int ndctl_dimm_disable(struct ndctl_dimm *dimm);
int ndctl_dimm_enable(struct ndctl_dimm *dimm);
+void ndctl_dimm_refresh_flags(struct ndctl_dimm *dimm);
struct ndctl_cmd;
struct ndctl_cmd *ndctl_bus_cmd_new_ars_cap(struct ndctl_bus *bus,
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