From patchwork Tue Dec 21 14:45:02 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shivaprasad G Bhat X-Patchwork-Id: 12689753 Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 50D172C82 for ; Tue, 21 Dec 2021 14:45:14 +0000 (UTC) Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 1BLDe3E4007416; Tue, 21 Dec 2021 14:45:12 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=subject : from : to : cc : date : message-id : mime-version : content-type : content-transfer-encoding; s=pp1; bh=JZIucTQP22m3OkJ/9eYdM7emApqGxg8/H+46VuJTq8c=; b=Sa7Y9yQicsyQNGZRsEI0Xvv1jQBidyeK9aK8+McsbZ6zZxykoqiAlx/LTdUQ4n4fjVCm edKJFO8KdXoPQbjcB/M4/am3jhkBRvH12dz3iAcsseWw7LputuuNF5U+StM7c3zKsB8g dmIFnvAHTnYdzzoRLAmNd7W4d0wI8xb1ufp2VMUqUcHtNm55ZBc3oyOeRjSBDyhVP9ef mMkkbnSD4E24e/Vq6Shar+89f9wyPYkTKQPSNuS/0ndYngGUTsvcaPEkYjDW6Bu3MIYX tkR3zUxZ+AAbjUF9aQDU1kN7Nmbe5iqYXYaM1ECR0sDgYawJ8KoEa7SbBw2EdGgp/n7n NA== Received: from ppma06fra.de.ibm.com (48.49.7a9f.ip4.static.sl-reverse.com [159.122.73.72]) by mx0a-001b2d01.pphosted.com with ESMTP id 3d3g0u9daa-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Dec 2021 14:45:11 +0000 Received: from pps.filterd (ppma06fra.de.ibm.com [127.0.0.1]) by ppma06fra.de.ibm.com (8.16.1.2/8.16.1.2) with SMTP id 1BLEhkkl028957; Tue, 21 Dec 2021 14:45:10 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma06fra.de.ibm.com with ESMTP id 3d16wjwmcb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Dec 2021 14:45:10 +0000 Received: from d06av24.portsmouth.uk.ibm.com (d06av24.portsmouth.uk.ibm.com [9.149.105.60]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 1BLEj5C036438510 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 21 Dec 2021 14:45:05 GMT Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 368244207D; Tue, 21 Dec 2021 14:45:05 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3979742047; Tue, 21 Dec 2021 14:45:04 +0000 (GMT) Received: from lep8c.aus.stglabs.ibm.com (unknown [9.40.192.207]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Tue, 21 Dec 2021 14:45:04 +0000 (GMT) Subject: [ndctl REPOST PATCH v3] libndctl: Update nvdimm flags in ndctl_cmd_submit() From: Shivaprasad G Bhat To: nvdimm@lists.linux.dev Cc: aneesh.kumar@linux.ibm.com, sbhat@linux.ibm.com, vaibhav@linux.ibm.com, dan.j.williams@intel.com, ira.weiny@intel.com, vishal.l.verma@intel.com Date: Tue, 21 Dec 2021 08:45:02 -0600 Message-ID: <164009789816.744139.2870779016511283907.stgit@lep8c.aus.stglabs.ibm.com> User-Agent: StGit/1.1+40.g1b20 Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: RbRm495FC8zK38LJY2jaaFhCe75hjhKr X-Proofpoint-ORIG-GUID: RbRm495FC8zK38LJY2jaaFhCe75hjhKr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.790,Hydra:6.0.425,FMLib:17.11.62.513 definitions=2021-12-21_04,2021-12-21_01,2021-12-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 adultscore=0 lowpriorityscore=0 mlxlogscore=999 spamscore=0 mlxscore=0 clxscore=1015 impostorscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2110150000 definitions=main-2112210068 From: Vaibhav Jain Presently after performing an inject-smart 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 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 ndctl_refresh_dimm_flags() thats called successfully submitting a 'struct ndctl_cmd' in ndctl_cmd_submit(). This ensures that correct nvdimm flags are reported after an interaction with the kernel module which may trigger a change nvdimm-flags. 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_refresh_dimm_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_refresh_dimm_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 ndctl_refresh_dimm_flags() is invoked at the end of ndctl_cmd_submit() if nd-command submission succeeds. Signed-off-by: Vaibhav Jain Signed-off-by: Shivaprasad G Bhat --- ndctl/lib/libndctl.c | 52 +++++++++++++++++++++++++++++++++++++------------- ndctl/lib/private.h | 1 + ndctl/libndctl.h | 1 + 3 files changed, 40 insertions(+), 14 deletions(-) diff --git a/ndctl/lib/libndctl.c b/ndctl/lib/libndctl.c index 36ad1e7b..70b556bd 100644 --- a/ndctl/lib/libndctl.c +++ b/ndctl/lib/libndctl.c @@ -608,6 +608,7 @@ static void free_dimm(struct ndctl_dimm *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) @@ -1670,14 +1671,34 @@ static int ndctl_bind(struct ndctl_ctx *ctx, struct kmod_module *module, static int ndctl_unbind(struct ndctl_ctx *ctx, const char *devpath); static struct kmod_module *to_module(struct ndctl_ctx *ctx, const char *alias); +void ndctl_refresh_dimm_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; @@ -1761,16 +1782,10 @@ static int populate_dimm_attributes(struct ndctl_dimm *dimm, } 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_refresh_dimm_flags(dimm); + rc = 0; err_read: @@ -1826,8 +1841,9 @@ static int add_papr_dimm(struct ndctl_dimm *dimm, const char *dimm_base) 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); @@ -1924,9 +1940,13 @@ static void *add_dimm(void *parent, int id, const char *dimm_base) 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"); + rc = dimm->bus_prefix ? + populate_dimm_attributes(dimm, dimm_base) : -ENOMEM; } else if (ndctl_bus_has_of_node(bus)) { - rc = add_papr_dimm(dimm, dimm_base); + dimm->bus_prefix = strdup("papr"); + rc = dimm->bus_prefix ? + add_papr_dimm(dimm, dimm_base) : -ENOMEM; } if (rc == -ENODEV) { @@ -3506,6 +3526,10 @@ NDCTL_EXPORT int ndctl_cmd_submit(struct ndctl_cmd *cmd) rc = -ENXIO; } close(fd); + + /* update dimm-flags if command submitted successfully */ + if (!rc && cmd->dimm) + ndctl_refresh_dimm_flags(cmd->dimm); out: cmd->status = rc; return rc; diff --git a/ndctl/lib/private.h b/ndctl/lib/private.h index d442e6c1..cd2265ff 100644 --- a/ndctl/lib/private.h +++ b/ndctl/lib/private.h @@ -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 --git a/ndctl/libndctl.h b/ndctl/libndctl.h index 4d5cdbf6..b1bafd6d 100644 --- a/ndctl/libndctl.h +++ b/ndctl/libndctl.h @@ -223,6 +223,7 @@ int ndctl_dimm_is_active(struct ndctl_dimm *dimm); 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_refresh_dimm_flags(struct ndctl_dimm *dimm); struct ndctl_cmd; struct ndctl_cmd *ndctl_bus_cmd_new_ars_cap(struct ndctl_bus *bus,