Fix BlockGuard error checking
Signed-off-by: James Smart <james.sm...@emulex.com>
---
lpfc_scsi.c | 109 ++++++++++++++++++++++++++++++++++--------------------------
1 file changed, 62 insertions(+), 47 deletions(-)
diff -upNr a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
--- a/drivers/scsi/lpfc/lpfc_scsi.c 2013-05-31 10:58:07.689057397 -0400
+++ b/drivers/scsi/lpfc/lpfc_scsi.c 2013-05-31 10:58:12.310057503 -0400
@@ -68,14 +68,12 @@ struct scsi_dif_tuple {
__be32 ref_tag; /* Target LBA or indirect LBA */
};
-#if !defined(SCSI_PROT_GUARD_CHECK) || !defined(SCSI_PROT_REF_CHECK)
-#define scsi_prot_flagged(sc, flg) sc
-#endif
-
static void
lpfc_release_scsi_buf_s4(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
static void
lpfc_release_scsi_buf_s3(struct lpfc_hba *phba, struct lpfc_scsi_buf *psb);
+static int
+lpfc_prot_group_type(struct lpfc_hba *phba, struct scsi_cmnd *sc);
static void
lpfc_debug_save_data(struct lpfc_hba *phba, struct scsi_cmnd *cmnd)
@@ -134,6 +132,30 @@ lpfc_debug_save_dif(struct lpfc_hba *phb
}
}
+static inline unsigned
+lpfc_cmd_blksize(struct scsi_cmnd *sc)
+{
+ return sc->device->sector_size;
+}
+
+#define LPFC_CHECK_PROTECT_GUARD 1
+#define LPFC_CHECK_PROTECT_REF 2
+static inline unsigned
+lpfc_cmd_protect(struct scsi_cmnd *sc, int flag)
+{
+ return 1;
+}
+
+static inline unsigned
+lpfc_cmd_guard_csum(struct scsi_cmnd *sc)
+{
+ if (lpfc_prot_group_type(NULL, sc) == LPFC_PG_TYPE_NO_DIF)
+ return 0;
+ if (scsi_host_get_guard(sc->device->host) == SHOST_DIX_GUARD_IP)
+ return 1;
+ return 0;
+}
+
/**
* lpfc_sli4_set_rsp_sgl_last - Set the last bit in the response sge.
* @phba: Pointer to HBA object.
@@ -1409,12 +1431,6 @@ lpfc_scsi_prep_dma_buf_s3(struct lpfc_hb
return 0;
}
-static inline unsigned
-lpfc_cmd_blksize(struct scsi_cmnd *sc)
-{
- return sc->device->sector_size;
-}
-
#ifdef CONFIG_SCSI_LPFC_DEBUG_FS
/* Return if if error injection is detected by Initiator */
@@ -1847,10 +1863,9 @@ static int
lpfc_sc_to_bg_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
uint8_t *txop, uint8_t *rxop)
{
- uint8_t guard_type = scsi_host_get_guard(sc->device->host);
uint8_t ret = 0;
- if (guard_type == SHOST_DIX_GUARD_IP) {
+ if (lpfc_cmd_guard_csum(sc)) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
@@ -1928,10 +1943,9 @@ static int
lpfc_bg_err_opcodes(struct lpfc_hba *phba, struct scsi_cmnd *sc,
uint8_t *txop, uint8_t *rxop)
{
- uint8_t guard_type = scsi_host_get_guard(sc->device->host);
uint8_t ret = 0;
- if (guard_type == SHOST_DIX_GUARD_IP) {
+ if (lpfc_cmd_guard_csum(sc)) {
switch (scsi_get_prot_op(sc)) {
case SCSI_PROT_READ_INSERT:
case SCSI_PROT_WRITE_STRIP:
@@ -2078,12 +2092,12 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba,
* protection data is automatically generated, not checked.
*/
if (datadir == DMA_FROM_DEVICE) {
- if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(pde6_ce, pde6, checking);
else
bf_set(pde6_ce, pde6, 0);
- if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(pde6_re, pde6, checking);
else
bf_set(pde6_re, pde6, 0);
@@ -2240,12 +2254,12 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *
bf_set(pde6_optx, pde6, txop);
bf_set(pde6_oprx, pde6, rxop);
- if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(pde6_ce, pde6, checking);
else
bf_set(pde6_ce, pde6, 0);
- if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(pde6_re, pde6, checking);
else
bf_set(pde6_re, pde6, 0);
@@ -2454,12 +2468,12 @@ lpfc_bg_setup_sgl(struct lpfc_hba *phba,
* protection data is automatically generated, not checked.
*/
if (sc->sc_data_direction == DMA_FROM_DEVICE) {
- if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD))
bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_ce, diseed, 0);
- if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
@@ -2610,7 +2624,7 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *
diseed->ref_tag = cpu_to_le32(reftag);
diseed->ref_tag_tran = diseed->ref_tag;
- if (scsi_prot_flagged(sc, SCSI_PROT_GUARD_CHECK)) {
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_GUARD)) {
bf_set(lpfc_sli4_sge_dif_ce, diseed, checking);
} else {
@@ -2629,7 +2643,7 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *
}
- if (scsi_prot_flagged(sc, SCSI_PROT_REF_CHECK))
+ if (lpfc_cmd_protect(sc, LPFC_CHECK_PROTECT_REF))
bf_set(lpfc_sli4_sge_dif_re, diseed, checking);
else
bf_set(lpfc_sli4_sge_dif_re, diseed, 0);
@@ -2792,11 +2806,12 @@ lpfc_prot_group_type(struct lpfc_hba *ph
ret = LPFC_PG_TYPE_DIF_BUF;
break;
default:
- lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
- "9021 Unsupported protection op:%d\n", op);
+ if (phba)
+ lpfc_printf_log(phba, KERN_ERR, LOG_FCP,
+ "9021 Unsupported protection op:%d\n",
+ op);
break;
}
-
return ret;
}
@@ -2821,22 +2836,22 @@ lpfc_bg_scsi_adjust_dl(struct lpfc_hba *
/* Check if there is protection data on the wire */
if (sc->sc_data_direction == DMA_FROM_DEVICE) {
- /* Read */
+ /* Read check for protection data */
if (scsi_get_prot_op(sc) == SCSI_PROT_READ_INSERT)
return fcpdl;
} else {
- /* Write */
+ /* Write check for protection data */
if (scsi_get_prot_op(sc) == SCSI_PROT_WRITE_STRIP)
return fcpdl;
}
/*
* If we are in DIF Type 1 mode every data block has a 8 byte
- * DIF (trailer) attached to it. Must ajust FCP data length.
+ * DIF (trailer) attached to it. Must ajust FCP data length
+ * to account for the protection data.
*/
- if (scsi_prot_flagged(sc, SCSI_PROT_TRANSFER_PI))
- fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
+ fcpdl += (fcpdl / lpfc_cmd_blksize(sc)) * 8;
return fcpdl;
}
@@ -3090,25 +3105,10 @@ lpfc_calc_bg_err(struct lpfc_hba *phba,
goto skipit;
}
- /* App Tag checking */
- app_tag = src->app_tag;
- if (chk_app && (app_tag != start_app_tag)) {
- err_type = BGS_APPTAG_ERR_MASK;
- goto out;
- }
-
- /* Reference Tag checking */
- ref_tag = be32_to_cpu(src->ref_tag);
- if (chk_ref && (ref_tag != start_ref_tag)) {
- err_type = BGS_REFTAG_ERR_MASK;
- goto out;
- }
- start_ref_tag++;
-
- /* Guard Tag checking */
+ /* First Guard Tag checking */
if (chk_guard) {
guard_tag = src->guard_tag;
- if (guard_type == SHOST_DIX_GUARD_IP)
+ if (lpfc_cmd_guard_csum(cmd))
sum = lpfc_bg_csum(data_src,
blksize);
else
@@ -3119,6 +3119,21 @@ lpfc_calc_bg_err(struct lpfc_hba *phba,
goto out;
}
}
+
+ /* Reference Tag checking */
+ ref_tag = be32_to_cpu(src->ref_tag);
+ if (chk_ref && (ref_tag != start_ref_tag)) {
+ err_type = BGS_REFTAG_ERR_MASK;
+ goto out;
+ }
+ start_ref_tag++;
+
+ /* App Tag checking */
+ app_tag = src->app_tag;
+ if (chk_app && (app_tag != start_app_tag)) {
+ err_type = BGS_APPTAG_ERR_MASK;
+ goto out;
+ }
skipit:
len -= sizeof(struct scsi_dif_tuple);
if (len < 0)
--
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