scsi: lpfc: Fix reftag generation sizing errors

An LBA is 8 bytes. The driver generates a reftag from the LBA but the
reftag is 4 bytes. Thus scsi_get_lba() could return a value that exceeds
our reftag size.

Fix by converting all the code to calling the common routine
t10_pi_ref_tag() which returns a u32, thus ensuring a consistent 4byte
value.  Also correct a few code lines that access LBA directly and ensure
64-bit data types are used.

Link: https://lore.kernel.org/r/20210301171821.3427-4-jsmart2021@gmail.com
Co-developed-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index a4d6973..3e1bc55 100644 (file)
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -132,6 +132,8 @@ lpfc_sli4_set_rsp_sgl_last(struct lpfc_hba *phba,
        }
 }
 
+#define LPFC_INVALID_REFTAG ((u32)-1)
+
 /**
  * lpfc_update_stats - Update statistical data for the command completion
  * @vport: The virtual port on which this call is executing.
@@ -1000,7 +1002,7 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
        uint32_t op = scsi_get_prot_op(sc);
        uint32_t blksize;
        uint32_t numblks;
-       sector_t lba;
+       u32 lba;
        int rc = 0;
        int blockoff = 0;
 
@@ -1008,7 +1010,9 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
                return 0;
 
        sgpe = scsi_prot_sglist(sc);
-       lba = scsi_get_lba(sc);
+       lba = t10_pi_ref_tag(sc->request);
+       if (lba == LPFC_INVALID_REFTAG)
+               return 0;
 
        /* First check if we need to match the LBA */
        if (phba->lpfc_injerr_lba != LPFC_INJERR_LBA_OFF) {
@@ -1016,11 +1020,11 @@ lpfc_bg_err_inject(struct lpfc_hba *phba, struct scsi_cmnd *sc,
                numblks = (scsi_bufflen(sc) + blksize - 1) / blksize;
 
                /* Make sure we have the right LBA if one is specified */
-               if ((phba->lpfc_injerr_lba < lba) ||
-                       (phba->lpfc_injerr_lba >= (lba + numblks)))
+               if (phba->lpfc_injerr_lba < (u64)lba ||
+                   (phba->lpfc_injerr_lba >= (u64)(lba + numblks)))
                        return 0;
                if (sgpe) {
-                       blockoff = phba->lpfc_injerr_lba - lba;
+                       blockoff = phba->lpfc_injerr_lba - (u64)lba;
                        numblks = sg_dma_len(sgpe) /
                                sizeof(struct scsi_dif_tuple);
                        if (numblks < blockoff)
@@ -1589,7 +1593,9 @@ lpfc_bg_setup_bpl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
                goto out;
 
        /* extract some info from the scsi command for pde*/
-       reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
+       reftag = t10_pi_ref_tag(sc->request);
+       if (reftag == LPFC_INVALID_REFTAG)
+               goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
        rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@@ -1750,7 +1756,9 @@ lpfc_bg_setup_bpl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 
        /* extract some info from the scsi command */
        blksize = lpfc_cmd_blksize(sc);
-       reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
+       reftag = t10_pi_ref_tag(sc->request);
+       if (reftag == LPFC_INVALID_REFTAG)
+               goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
        rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@@ -1979,7 +1987,9 @@ lpfc_bg_setup_sgl(struct lpfc_hba *phba, struct scsi_cmnd *sc,
                goto out;
 
        /* extract some info from the scsi command for pde*/
-       reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
+       reftag = t10_pi_ref_tag(sc->request);
+       if (reftag == LPFC_INVALID_REFTAG)
+               goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
        rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@@ -2178,7 +2188,9 @@ lpfc_bg_setup_sgl_prot(struct lpfc_hba *phba, struct scsi_cmnd *sc,
 
        /* extract some info from the scsi command */
        blksize = lpfc_cmd_blksize(sc);
-       reftag = (uint32_t)scsi_get_lba(sc); /* Truncate LBA */
+       reftag = t10_pi_ref_tag(sc->request);
+       if (reftag == LPFC_INVALID_REFTAG)
+               goto out;
 
 #ifdef CONFIG_SCSI_LPFC_DEBUG_FS
        rc = lpfc_bg_err_inject(phba, sc, &reftag, NULL, 1);
@@ -2770,7 +2782,9 @@ lpfc_calc_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd)
                        chk_guard = 1;
 
                src = (struct scsi_dif_tuple *)sg_virt(sgpe);
-               start_ref_tag = (uint32_t)scsi_get_lba(cmd); /* Truncate LBA */
+               start_ref_tag = t10_pi_ref_tag(cmd->request);
+               if (start_ref_tag == LPFC_INVALID_REFTAG)
+                       goto out;
                start_app_tag = src->app_tag;
                len = sgpe->length;
                while (src && protsegcnt) {
@@ -2861,8 +2875,8 @@ out:
                              SAM_STAT_CHECK_CONDITION;
                phba->bg_guard_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9069 BLKGRD: LBA %lx grd_tag error %x != %x\n",
-                               (unsigned long)scsi_get_lba(cmd),
+                               "9069 BLKGRD: reftag %x grd_tag err %x != %x\n",
+                               t10_pi_ref_tag(cmd->request),
                                sum, guard_tag);
 
        } else if (err_type == BGS_REFTAG_ERR_MASK) {
@@ -2873,8 +2887,8 @@ out:
 
                phba->bg_reftag_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9066 BLKGRD: LBA %lx ref_tag error %x != %x\n",
-                               (unsigned long)scsi_get_lba(cmd),
+                               "9066 BLKGRD: reftag %x ref_tag err %x != %x\n",
+                               t10_pi_ref_tag(cmd->request),
                                ref_tag, start_ref_tag);
 
        } else if (err_type == BGS_APPTAG_ERR_MASK) {
@@ -2885,8 +2899,8 @@ out:
 
                phba->bg_apptag_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9041 BLKGRD: LBA %lx app_tag error %x != %x\n",
-                               (unsigned long)scsi_get_lba(cmd),
+                               "9041 BLKGRD: reftag %x app_tag err %x != %x\n",
+                               t10_pi_ref_tag(cmd->request),
                                app_tag, start_app_tag);
        }
 }
@@ -3062,10 +3076,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
        if (lpfc_bgs_get_invalid_prof(bgstat)) {
                cmd->result = DID_ERROR << 16;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9072 BLKGRD: Invalid BG Profile in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9072 BLKGRD: Invalid BG Profile in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
                ret = (-1);
                goto out;
@@ -3074,10 +3088,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
        if (lpfc_bgs_get_uninit_dif_block(bgstat)) {
                cmd->result = DID_ERROR << 16;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9073 BLKGRD: Invalid BG PDIF Block in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9073 BLKGRD: Invalid BG PDIF Block in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
                ret = (-1);
                goto out;
@@ -3092,10 +3106,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
                              SAM_STAT_CHECK_CONDITION;
                phba->bg_guard_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9055 BLKGRD: Guard Tag error in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9055 BLKGRD: Guard Tag error in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
        }
 
@@ -3109,10 +3123,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
 
                phba->bg_reftag_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9056 BLKGRD: Ref Tag error in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9056 BLKGRD: Ref Tag error in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
        }
 
@@ -3126,10 +3140,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
 
                phba->bg_apptag_err_cnt++;
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9061 BLKGRD: App Tag error in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9061 BLKGRD: App Tag error in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
        }
 
@@ -3170,10 +3184,10 @@ lpfc_parse_bg_err(struct lpfc_hba *phba, struct lpfc_io_buf *lpfc_cmd,
        if (!ret) {
                /* No error was reported - problem in FW? */
                lpfc_printf_log(phba, KERN_WARNING, LOG_FCP | LOG_BG,
-                               "9057 BLKGRD: Unknown error in cmd"
-                               " 0x%x lba 0x%llx blk cnt 0x%x "
+                               "9057 BLKGRD: Unknown error in cmd "
+                               "0x%x reftag 0x%x blk cnt 0x%x "
                                "bgstat=x%x bghm=x%x\n", cmd->cmnd[0],
-                               (unsigned long long)scsi_get_lba(cmd),
+                               t10_pi_ref_tag(cmd->request),
                                blk_rq_sectors(cmd->request), bgstat, bghm);
 
                /* Calcuate what type of error it was */
@@ -5252,10 +5266,10 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
                        lpfc_printf_vlog(vport,
                                         KERN_INFO, LOG_SCSI_CMD,
                                         "9033 BLKGRD: rcvd %s cmd:x%x "
-                                        "sector x%llx cnt %u pt %x\n",
+                                        "reftag x%x cnt %u pt %x\n",
                                         dif_op_str[scsi_get_prot_op(cmnd)],
                                         cmnd->cmnd[0],
-                                        (unsigned long long)scsi_get_lba(cmnd),
+                                        t10_pi_ref_tag(cmnd->request),
                                         blk_rq_sectors(cmnd->request),
                                         (cmnd->cmnd[1]>>5));
                }
@@ -5265,9 +5279,9 @@ lpfc_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *cmnd)
                        lpfc_printf_vlog(vport,
                                         KERN_INFO, LOG_SCSI_CMD,
                                         "9038 BLKGRD: rcvd PROT_NORMAL cmd: "
-                                        "x%x sector x%llx cnt %u pt %x\n",
+                                        "x%x reftag x%x cnt %u pt %x\n",
                                         cmnd->cmnd[0],
-                                        (unsigned long long)scsi_get_lba(cmnd),
+                                        t10_pi_ref_tag(cmnd->request),
                                         blk_rq_sectors(cmnd->request),
                                         (cmnd->cmnd[1]>>5));
                }