int apei_write_mce(struct mce *m)
{
struct cper_mce_record rcd;
if (!m)
return -EINVAL;
memset(&rcd, 0, sizeof(rcd));
memcpy(rcd.hdr.signature, CPER_SIG_RECORD, CPER_SIG_SIZE);
rcd.hdr.revision = CPER_RECORD_REV;
rcd.hdr.signature_end = CPER_SIG_END;
rcd.hdr.section_count = 1;
rcd.hdr.error_severity = CPER_SER_FATAL;
/* timestamp, platform_id, partition_id are all invalid */
rcd.hdr.validation_bits = 0;
rcd.hdr.record_length = sizeof(rcd);
rcd.hdr.creator_id = CPER_CREATOR_MCE;
rcd.hdr.notification_type = CPER_NOTIFY_MCE;
rcd.hdr.record_id = cper_next_record_id();
rcd.hdr.flags = CPER_HW_ERROR_FLAGS_PREVERR;
rcd.sec_hdr.section_offset = (void *)&rcd.mce - (void *)&rcd;
rcd.sec_hdr.section_length = sizeof(rcd.mce);
rcd.sec_hdr.revision = CPER_SEC_REV;
/* fru_id and fru_text is invalid */
rcd.sec_hdr.validation_bits = 0;
rcd.sec_hdr.flags = CPER_SEC_PRIMARY;
rcd.sec_hdr.section_type = CPER_SECTION_TYPE_MCE;
rcd.sec_hdr.section_severity = CPER_SER_FATAL;
memcpy(&rcd.mce, m, sizeof(*m));
return erst_write(&rcd.hdr);
}
static ssize_t erst_dbg_write(struct file *filp, const char __user *ubuf,
size_t usize, loff_t *off)
{
int rc;
struct cper_record_header *rcd;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (usize > ERST_DBG_RECORD_LEN_MAX) {
pr_err(ERST_DBG_PFX "Too long record to be written\n");
return -EINVAL;
}
if (mutex_lock_interruptible(&erst_dbg_mutex))
return -EINTR;
if (usize > erst_dbg_buf_len) {
void *p;
rc = -ENOMEM;
p = kmalloc(usize, GFP_KERNEL);
if (!p)
goto out;
kfree(erst_dbg_buf);
erst_dbg_buf = p;
erst_dbg_buf_len = usize;
}
rc = copy_from_user(erst_dbg_buf, ubuf, usize);
if (rc) {
rc = -EFAULT;
goto out;
}
rcd = erst_dbg_buf;
rc = -EINVAL;
if (rcd->record_length != usize)
goto out;
rc = erst_write(erst_dbg_buf);
out:
mutex_unlock(&erst_dbg_mutex);
return rc < 0 ? rc : usize;
}