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scsi: lpfc: Correct errors accessing fw log

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This patch corrects two issues:

- An oops would occur if reading based on a non-zero offset.  Offset
  calculation was incorrect.

- Updates to ras config (logging level) were ignored if change was
  made while fw logging was enabled. Revise to dynamically update.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
James Smart 2018-10-23 13:41:05 -07:00 committed by Martin K. Petersen
parent 5cca2ab1b3
commit 191e2f7493
1 changed files with 25 additions and 39 deletions
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64
drivers/scsi/lpfc/lpfc_bsg.c
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@ -5416,7 +5416,7 @@ lpfc_bsg_set_ras_config(struct bsg_job *job)
struct lpfc_ras_fwlog *ras_fwlog = &phba->ras_fwlog;
struct fc_bsg_reply *bsg_reply = job->reply;
uint8_t action = 0, log_level = 0;
int rc = 0;
int rc = 0, action_status = 0;
if (job->request_len <
sizeof(struct fc_bsg_request) +
@ -5449,16 +5449,25 @@ lpfc_bsg_set_ras_config(struct bsg_job *job)
lpfc_ras_stop_fwlog(phba);
} else {
/*action = LPFC_RASACTION_START_LOGGING*/
if (ras_fwlog->ras_active == true) {
rc = -EINPROGRESS;
goto ras_job_error;
}
/* Even though FW-logging is active re-initialize
* FW-logging with new log-level. Return status
* "Logging already Running" to caller.
**/
if (ras_fwlog->ras_active)
action_status = -EINPROGRESS;
/* Enable logging */
rc = lpfc_sli4_ras_fwlog_init(phba, log_level,
LPFC_RAS_ENABLE_LOGGING);
if (rc)
if (rc) {
rc = -EINVAL;
goto ras_job_error;
}
/* Check if FW-logging is re-initialized */
if (action_status == -EINPROGRESS)
rc = action_status;
}
ras_job_error:
/* make error code available to userspace */
@ -5487,8 +5496,7 @@ lpfc_bsg_get_ras_lwpd(struct bsg_job *job)
struct lpfc_hba *phba = vport->phba;
struct lpfc_ras_fwlog *ras_fwlog = &phba->ras_fwlog;
struct fc_bsg_reply *bsg_reply = job->reply;
uint32_t lwpd_offset = 0;
uint64_t wrap_value = 0;
u32 *lwpd_ptr = NULL;
int rc = 0;
rc = lpfc_check_fwlog_support(phba);
@ -5508,11 +5516,12 @@ lpfc_bsg_get_ras_lwpd(struct bsg_job *job)
ras_reply = (struct lpfc_bsg_get_ras_lwpd *)
bsg_reply->reply_data.vendor_reply.vendor_rsp;
lwpd_offset = *((uint32_t *)ras_fwlog->lwpd.virt) & 0xffffffff;
ras_reply->offset = be32_to_cpu(lwpd_offset);
/* Get lwpd offset */
lwpd_ptr = (uint32_t *)(ras_fwlog->lwpd.virt);
ras_reply->offset = be32_to_cpu(*lwpd_ptr & 0xffffffff);
wrap_value = *((uint64_t *)ras_fwlog->lwpd.virt);
ras_reply->wrap_count = be32_to_cpu((wrap_value >> 32) & 0xffffffff);
/* Get wrap count */
ras_reply->wrap_count = be32_to_cpu(*(++lwpd_ptr) & 0xffffffff);
ras_job_error:
/* make error code available to userspace */
@ -5539,9 +5548,8 @@ lpfc_bsg_get_ras_fwlog(struct bsg_job *job)
struct fc_bsg_request *bsg_request = job->request;
struct fc_bsg_reply *bsg_reply = job->reply;
struct lpfc_bsg_get_fwlog_req *ras_req;
uint32_t rd_offset, rd_index, offset, pending_wlen;
uint32_t boundary = 0, align_len = 0, write_len = 0;
void *dest, *src, *fwlog_buff;
u32 rd_offset, rd_index, offset;
void *src, *fwlog_buff;
struct lpfc_ras_fwlog *ras_fwlog = NULL;
struct lpfc_dmabuf *dmabuf, *next;
int rc = 0;
@ -5581,8 +5589,6 @@ lpfc_bsg_get_ras_fwlog(struct bsg_job *job)
rd_index = (rd_offset / LPFC_RAS_MAX_ENTRY_SIZE);
offset = (rd_offset % LPFC_RAS_MAX_ENTRY_SIZE);
pending_wlen = ras_req->read_size;
dest = fwlog_buff;
list_for_each_entry_safe(dmabuf, next,
&ras_fwlog->fwlog_buff_list, list) {
@ -5590,29 +5596,9 @@ lpfc_bsg_get_ras_fwlog(struct bsg_job *job)
if (dmabuf->buffer_tag < rd_index)
continue;
/* Align read to buffer size */
if (offset) {
boundary = ((dmabuf->buffer_tag + 1) *
LPFC_RAS_MAX_ENTRY_SIZE);
align_len = (boundary - offset);
write_len = min_t(u32, align_len,
LPFC_RAS_MAX_ENTRY_SIZE);
} else {
write_len = min_t(u32, pending_wlen,
LPFC_RAS_MAX_ENTRY_SIZE);
align_len = 0;
boundary = 0;
}
src = dmabuf->virt + offset;
memcpy(dest, src, write_len);
pending_wlen -= write_len;
if (!pending_wlen)
break;
dest += write_len;
offset = (offset + write_len) % LPFC_RAS_MAX_ENTRY_SIZE;
memcpy(fwlog_buff, src, ras_req->read_size);
break;
}
bsg_reply->reply_payload_rcv_len =