From: Andrew Donnellan <ajd@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-integrity@vger.kernel.org Cc: ruscur@russell.cc, bgray@linux.ibm.com, nayna@linux.ibm.com, gcwilson@linux.ibm.com, gjoyce@linux.ibm.com, brking@linux.ibm.com, stefanb@linux.ibm.com, sudhakar@linux.ibm.com, erichte@linux.ibm.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, zohar@linux.ibm.com, joel@jms.id.au, npiggin@gmail.com Subject: [PATCH v5 13/25] powerpc/secvar: Don't print error on ENOENT when reading variables Date: Tue, 31 Jan 2023 17:39:16 +1100 [thread overview] Message-ID: <20230131063928.388035-14-ajd@linux.ibm.com> (raw) In-Reply-To: <20230131063928.388035-1-ajd@linux.ibm.com> If attempting to read the size or data attributes of a non-existent variable (which will be possible after a later patch to expose the PLPKS via the secvar interface), don't spam the kernel log with error messages. Only print errors for return codes that aren't ENOENT. Reported-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com> Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> --- v3: New patch --- arch/powerpc/kernel/secvar-sysfs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c index 9b6be63b7b36..ca3df3f7156c 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c @@ -43,8 +43,8 @@ static ssize_t size_show(struct kobject *kobj, struct kobj_attribute *attr, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error retrieving %s variable size %d\n", kobj->name, - rc); + if (rc != -ENOENT) + pr_err("Error retrieving %s variable size %d\n", kobj->name, rc); return rc; } @@ -61,7 +61,8 @@ static ssize_t data_read(struct file *filep, struct kobject *kobj, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error getting %s variable size %d\n", kobj->name, rc); + if (rc != -ENOENT) + pr_err("Error getting %s variable size %d\n", kobj->name, rc); return rc; } pr_debug("dsize is %llu\n", dsize); -- 2.39.1
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Donnellan <ajd@linux.ibm.com> To: linuxppc-dev@lists.ozlabs.org, linux-integrity@vger.kernel.org Cc: sudhakar@linux.ibm.com, erichte@linux.ibm.com, gregkh@linuxfoundation.org, nayna@linux.ibm.com, npiggin@gmail.com, linux-kernel@vger.kernel.org, zohar@linux.ibm.com, gjoyce@linux.ibm.com, ruscur@russell.cc, joel@jms.id.au, bgray@linux.ibm.com, brking@linux.ibm.com, gcwilson@linux.ibm.com, stefanb@linux.ibm.com Subject: [PATCH v5 13/25] powerpc/secvar: Don't print error on ENOENT when reading variables Date: Tue, 31 Jan 2023 17:39:16 +1100 [thread overview] Message-ID: <20230131063928.388035-14-ajd@linux.ibm.com> (raw) In-Reply-To: <20230131063928.388035-1-ajd@linux.ibm.com> If attempting to read the size or data attributes of a non-existent variable (which will be possible after a later patch to expose the PLPKS via the secvar interface), don't spam the kernel log with error messages. Only print errors for return codes that aren't ENOENT. Reported-by: Sudhakar Kuppusamy <sudhakar@linux.ibm.com> Signed-off-by: Andrew Donnellan <ajd@linux.ibm.com> --- v3: New patch --- arch/powerpc/kernel/secvar-sysfs.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/kernel/secvar-sysfs.c b/arch/powerpc/kernel/secvar-sysfs.c index 9b6be63b7b36..ca3df3f7156c 100644 --- a/arch/powerpc/kernel/secvar-sysfs.c +++ b/arch/powerpc/kernel/secvar-sysfs.c @@ -43,8 +43,8 @@ static ssize_t size_show(struct kobject *kobj, struct kobj_attribute *attr, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error retrieving %s variable size %d\n", kobj->name, - rc); + if (rc != -ENOENT) + pr_err("Error retrieving %s variable size %d\n", kobj->name, rc); return rc; } @@ -61,7 +61,8 @@ static ssize_t data_read(struct file *filep, struct kobject *kobj, rc = secvar_ops->get(kobj->name, strlen(kobj->name) + 1, NULL, &dsize); if (rc) { - pr_err("Error getting %s variable size %d\n", kobj->name, rc); + if (rc != -ENOENT) + pr_err("Error getting %s variable size %d\n", kobj->name, rc); return rc; } pr_debug("dsize is %llu\n", dsize); -- 2.39.1
next prev parent reply other threads:[~2023-01-31 6:40 UTC|newest] Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-01-31 6:39 [PATCH v5 00/25] pSeries dynamic secure boot secvar interface + platform keyring loading Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 01/25] powerpc/pseries: Fix handling of PLPKS object flushing timeout Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 02/25] powerpc/pseries: Fix alignment of PLPKS structures and buffers Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 03/25] powerpc/secvar: Fix incorrect return in secvar_sysfs_load() Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:18 ` Stefan Berger 2023-01-31 15:18 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 04/25] powerpc/secvar: Use u64 in secvar_operations Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 05/25] powerpc/secvar: Warn and error if multiple secvar ops are set Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 14:48 ` Stefan Berger 2023-01-31 14:48 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 06/25] powerpc/secvar: Use sysfs_emit() instead of sprintf() Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:20 ` Stefan Berger 2023-01-31 15:20 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 07/25] powerpc/secvar: Handle format string in the consumer Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:23 ` Stefan Berger 2023-01-31 15:23 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 08/25] powerpc/secvar: Handle max object size " Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:26 ` Stefan Berger 2023-01-31 15:26 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 09/25] powerpc/secvar: Clean up init error messages Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:45 ` Stefan Berger 2023-01-31 15:45 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 10/25] powerpc/secvar: Extend sysfs to include config vars Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:49 ` Stefan Berger 2023-01-31 15:49 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 11/25] powerpc/secvar: Allow backend to populate static list of variable names Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:54 ` Stefan Berger 2023-01-31 15:54 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 12/25] powerpc/secvar: Warn when PAGE_SIZE is smaller than max object size Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:57 ` Stefan Berger 2023-01-31 15:57 ` Stefan Berger 2023-01-31 6:39 ` Andrew Donnellan [this message] 2023-01-31 6:39 ` [PATCH v5 13/25] powerpc/secvar: Don't print error on ENOENT when reading variables Andrew Donnellan 2023-01-31 15:58 ` Stefan Berger 2023-01-31 15:58 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 14/25] powerpc/pseries: Move plpks.h to include directory Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 15:59 ` Stefan Berger 2023-01-31 15:59 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 15/25] powerpc/pseries: Move PLPKS constants to header file Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:07 ` Stefan Berger 2023-01-31 16:07 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 16/25] powerpc/pseries: Expose PLPKS config values, support additional fields Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:13 ` Stefan Berger 2023-01-31 16:13 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 17/25] powerpc/pseries: Implement signed update for PLPKS objects Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:30 ` Stefan Berger 2023-01-31 16:30 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 18/25] powerpc/pseries: Log hcall return codes for PLPKS debug Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:31 ` Stefan Berger 2023-01-31 16:31 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 19/25] powerpc/pseries: Make caller pass buffer to plpks_read_var() Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:38 ` Stefan Berger 2023-01-31 16:38 ` Stefan Berger 2023-02-07 5:25 ` Andrew Donnellan 2023-02-07 5:25 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 20/25] powerpc/pseries: Turn PSERIES_PLPKS into a hidden option Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:40 ` Stefan Berger 2023-01-31 16:40 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 21/25] powerpc/pseries: Add helper to get PLPKS password length Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:42 ` Stefan Berger 2023-01-31 16:42 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 22/25] powerpc/pseries: Pass PLPKS password on kexec Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 16:52 ` Stefan Berger 2023-01-31 16:52 ` Stefan Berger 2023-01-31 6:39 ` [PATCH v5 23/25] powerpc/pseries: Implement secvars for dynamic secure boot Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 17:11 ` Stefan Berger 2023-01-31 17:11 ` Stefan Berger 2023-02-01 6:32 ` Andrew Donnellan 2023-02-01 6:32 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 24/25] integrity/powerpc: Improve error handling & reporting when loading certs Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 6:39 ` [PATCH v5 25/25] integrity/powerpc: Support loading keys from PLPKS Andrew Donnellan 2023-01-31 6:39 ` Andrew Donnellan 2023-01-31 17:17 ` Stefan Berger 2023-01-31 17:17 ` Stefan Berger
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