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virpcivpd: reduce errors in log due to invalid VPD

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Sadly some devices provide invalid VPD data even with fully updated
firmware. Former hardning like 600f580d "PCI VPD: Skip fields with
invalid values" have already helped for those to some extent.
But if one happens to have such a device installed in the system,
despite all other things working properly the log potentially
flooded with messages like:
  internal error: The keyword is not comprised only of uppercase ASCII
  letters or digits
  internal error: A field data length violates the resource length boundary.

The user can't do anything about it to change that, they will be there on
any libvirt restart and potentially distract from other more important
issues.

Since the vpd decoding is implemented rather resilient (if parsing fails
all goes on fine, the respective device just has no VPD data populated
eventually) we can lower those from virReportError(VIR_ERR_INTERNAL_ERROR
to just VIR_INFO. If needed for debugging people can set the level
accordingly, but otherwise we would no more fill the logs with errors
without a strong reason.

Fixes: https://launchpad.net/bugs/1990949

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Christian Ehrhardt 2022-09-27 12:17:41 +02:00 committed by Michal Privoznik
parent 31ea9433aa
commit a2fe32a71b
1 changed files with 16 additions and 31 deletions
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47
src/util/virpcivpd.c
View File

@ -62,12 +62,11 @@ virPCIVPDResourceGetKeywordPrefix(const char *keyword)
/* Keywords must have a length of 2 bytes. */ /* Keywords must have a length of 2 bytes. */
if (strlen(keyword) != 2) { if (strlen(keyword) != 2) {
virReportError(VIR_ERR_INTERNAL_ERROR, _("The keyword length is not 2 bytes: %s"), keyword); VIR_INFO("The keyword length is not 2 bytes: %s", keyword);
return NULL; return NULL;
} else if (!(virPCIVPDResourceIsUpperOrNumber(keyword[0]) && } else if (!(virPCIVPDResourceIsUpperOrNumber(keyword[0]) &&
virPCIVPDResourceIsUpperOrNumber(keyword[1]))) { virPCIVPDResourceIsUpperOrNumber(keyword[1]))) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("The keyword is not comprised only of uppercase ASCII letters or digits");
_("The keyword is not comprised only of uppercase ASCII letters or digits"));
return NULL; return NULL;
} }
/* Special-case the system-specific keywords since they share the "Y" prefix with "YA". */ /* Special-case the system-specific keywords since they share the "Y" prefix with "YA". */
@ -328,19 +327,16 @@ virPCIVPDResourceUpdateKeyword(virPCIVPDResource *res, const bool readOnly,
const char *const keyword, const char *const value) const char *const keyword, const char *const value)
{ {
if (!res) { if (!res) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Cannot update the resource: a NULL resource pointer has been provided.");
_("Cannot update the resource: a NULL resource pointer has been provided."));
return false; return false;
} else if (!keyword) { } else if (!keyword) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Cannot update the resource: a NULL keyword pointer has been provided.");
_("Cannot update the resource: a NULL keyword pointer has been provided."));
return false; return false;
} }
if (readOnly) { if (readOnly) {
if (!res->ro) { if (!res->ro) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Cannot update the read-only keyword: RO section not initialized.");
_("Cannot update the read-only keyword: RO section not initialized."));
return false; return false;
} }
@ -375,9 +371,7 @@ virPCIVPDResourceUpdateKeyword(virPCIVPDResource *res, const bool readOnly,
} else { } else {
if (!res->rw) { if (!res->rw) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Cannot update the read-write keyword: read-write section not initialized.");
_
("Cannot update the read-write keyword: read-write section not initialized."));
return false; return false;
} }
@ -476,8 +470,7 @@ virPCIVPDParseVPDLargeResourceFields(int vpdFileFd, uint16_t resPos, uint16_t re
if (virPCIVPDReadVPDBytes(vpdFileFd, buf, 3, fieldPos, csum) != 3) { if (virPCIVPDReadVPDBytes(vpdFileFd, buf, 3, fieldPos, csum) != 3) {
/* Invalid field encountered which means the resource itself is invalid too. Report /* Invalid field encountered which means the resource itself is invalid too. Report
* That VPD has invalid format and bail. */ * That VPD has invalid format and bail. */
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Could not read a resource field header - VPD has invalid format");
_("Could not read a resource field header - VPD has invalid format"));
return false; return false;
} }
fieldDataLen = buf[2]; fieldDataLen = buf[2];
@ -488,12 +481,10 @@ virPCIVPDParseVPDLargeResourceFields(int vpdFileFd, uint16_t resPos, uint16_t re
/* Handle special cases first */ /* Handle special cases first */
if (!readOnly && fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RESVD) { if (!readOnly && fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RESVD) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Unexpected RV keyword in the read-write section.");
_("Unexpected RV keyword in the read-write section."));
return false; return false;
} else if (readOnly && fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RDWR) { } else if (readOnly && fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RDWR) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Unexpected RW keyword in the read-only section.");
_("Unexpected RW keyword in the read-only section."));
return false; return false;
} }
@ -517,21 +508,18 @@ virPCIVPDParseVPDLargeResourceFields(int vpdFileFd, uint16_t resPos, uint16_t re
bytesToRead = fieldDataLen; bytesToRead = fieldDataLen;
break; break;
default: default:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Unexpected field value format encountered.");
_("Unexpected field value format encountered."));
return false; return false;
} }
if (resPos + resDataLen < fieldPos + fieldDataLen) { if (resPos + resDataLen < fieldPos + fieldDataLen) {
/* In this case the field cannot simply be skipped since the position of the /* In this case the field cannot simply be skipped since the position of the
* next field is determined based on the length of a previous field. */ * next field is determined based on the length of a previous field. */
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("A field data length violates the resource length boundary.");
_("A field data length violates the resource length boundary."));
return false; return false;
} }
if (virPCIVPDReadVPDBytes(vpdFileFd, buf, bytesToRead, fieldPos, csum) != bytesToRead) { if (virPCIVPDReadVPDBytes(vpdFileFd, buf, bytesToRead, fieldPos, csum) != bytesToRead) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Could not parse a resource field data - VPD has invalid format");
_("Could not parse a resource field data - VPD has invalid format"));
return false; return false;
} }
/* Advance the position to the first byte of the next field. */ /* Advance the position to the first byte of the next field. */
@ -552,7 +540,7 @@ virPCIVPDParseVPDLargeResourceFields(int vpdFileFd, uint16_t resPos, uint16_t re
} else if (fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RESVD) { } else if (fieldFormat == VIR_PCI_VPD_RESOURCE_FIELD_VALUE_FORMAT_RESVD) {
if (*csum) { if (*csum) {
/* All bytes up to and including the checksum byte should add up to 0. */ /* All bytes up to and including the checksum byte should add up to 0. */
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", _("Checksum validation has failed")); VIR_INFO("Checksum validation has failed");
return false; return false;
} }
hasChecksum = true; hasChecksum = true;
@ -578,8 +566,7 @@ virPCIVPDParseVPDLargeResourceFields(int vpdFileFd, uint16_t resPos, uint16_t re
} }
/* The field format, keyword and value are determined. Attempt to update the resource. */ /* The field format, keyword and value are determined. Attempt to update the resource. */
if (!virPCIVPDResourceUpdateKeyword(res, readOnly, fieldKeyword, fieldValue)) { if (!virPCIVPDResourceUpdateKeyword(res, readOnly, fieldKeyword, fieldValue)) {
virReportError(VIR_ERR_INTERNAL_ERROR, VIR_INFO("Could not update the VPD resource keyword: %s", fieldKeyword);
_("Could not update the VPD resource keyword: %s"), fieldKeyword);
return false; return false;
} }
} }
@ -627,14 +614,12 @@ virPCIVPDParseVPDLargeResourceString(int vpdFileFd, uint16_t resPos,
g_autofree char *buf = g_malloc0(resDataLen + 1); g_autofree char *buf = g_malloc0(resDataLen + 1);
if (virPCIVPDReadVPDBytes(vpdFileFd, (uint8_t *)buf, resDataLen, resPos, csum) != resDataLen) { if (virPCIVPDReadVPDBytes(vpdFileFd, (uint8_t *)buf, resDataLen, resPos, csum) != resDataLen) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("Could not read a part of a resource - VPD has invalid format");
_("Could not read a part of a resource - VPD has invalid format"));
return false; return false;
} }
resValue = g_strdup(g_strstrip(buf)); resValue = g_strdup(g_strstrip(buf));
if (!virPCIVPDResourceIsValidTextValue(resValue)) { if (!virPCIVPDResourceIsValidTextValue(resValue)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s", VIR_INFO("The string resource has invalid characters in its value");
_("The string resource has invalid characters in its value"));
return false; return false;
} }
res->name = g_steal_pointer(&resValue); res->name = g_steal_pointer(&resValue);