Hi Chandra, Yes, I can swap the patches. Then I won't have this problem. Reason I did that was to make the patches independent while compiling. Thanks Babu Moger > -----Original Message----- > From: Chandra Seetharaman [mailto:sekharan@xxxxxxxxxx] > Sent: Thursday, September 03, 2009 12:13 PM > To: Moger, Babu > Cc: 'linux-scsi@xxxxxxxxxxxxxxx'; 'device mapper development'; > 'sekharan@xxxxxxxxxxxxxxxxxx'; Chauhan, Vijay; Stankey, Robert; > Dachepalli, Sudhir > Subject: Re: [PATCH 1/3][RESUBMIT] scsi_dh_rdac: changes to collect the > rdac debug information during the initialization > > Babu, > > There is a small issue with this patch. > > array_name is a local variable in rdac_attach() and is initialized > there, but the array_name used in initialize_controller() which is > called from rdac_activate is never initialized. > > I see that it is fixed in the 2/3. But this patch is incorrect. > > One thing you can do is to swap 1/3 and 2/3. Then you will not have > this > issue. > > regards, > > chandra > On Wed, 2009-09-02 at 17:12 -0600, Moger, Babu wrote: > > Adding the code to read the debug information during initialization. > This patch collects the information about storage and controllers > during rdac_activate. > > > > Signed-off-by: Babu Moger <babu.moger@xxxxxxx> > > Reviewed-by: Vijay Chauhan <vijay.chauhan@xxxxxxx> > > Reviewed-by: Bob Stankey <Robert.stankey@xxxxxxx> > > > > --- > > > > --- linux-2.6.31-rc5/drivers/scsi/device_handler/scsi_dh_rdac.c.orig > 2009-09-02 09:49:23.000000000 -0500 > > +++ linux-2.6.31-rc5/drivers/scsi/device_handler/scsi_dh_rdac.c 2009- > 09-02 10:04:40.000000000 -0500 > > @@ -112,6 +112,7 @@ struct c9_inquiry { > > > > #define SUBSYS_ID_LEN 16 > > #define SLOT_ID_LEN 2 > > +#define ARRAY_LABEL_LEN 31 > > > > struct c4_inquiry { > > u8 peripheral_info; > > @@ -135,6 +136,8 @@ struct rdac_controller { > > struct rdac_pg_legacy legacy; > > struct rdac_pg_expanded expanded; > > } mode_select; > > + u8 index; > > + u8 array_name[ARRAY_LABEL_LEN]; > > }; > > struct c8_inquiry { > > u8 peripheral_info; > > @@ -303,7 +306,8 @@ static void release_controller(struct kr > > kfree(ctlr); > > } > > > > -static struct rdac_controller *get_controller(u8 *subsys_id, u8 > *slot_id) > > +static struct rdac_controller *get_controller(u8 *subsys_id, u8 > *slot_id, > > + char *array_name) > > { > > struct rdac_controller *ctlr, *tmp; > > > > @@ -324,6 +328,14 @@ static struct rdac_controller *get_contr > > /* initialize fields of controller */ > > memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN); > > memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN); > > + memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN); > > + > > + /* update the controller index */ > > + if (slot_id[1] == 0x31) > > + ctlr->index = 0; > > + else > > + ctlr->index = 1; > > + > > kref_init(&ctlr->kref); > > ctlr->use_ms10 = -1; > > list_add(&ctlr->node, &ctlr_list); > > @@ -363,9 +375,10 @@ done: > > return err; > > } > > > > -static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h) > > +static int get_lun_info(struct scsi_device *sdev, struct > rdac_dh_data *h, > > + char *array_name) > > { > > - int err; > > + int err, i; > > struct c8_inquiry *inqp; > > > > err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry), h); > > @@ -377,6 +390,11 @@ static int get_lun(struct scsi_device *s > > inqp->page_id[2] != 'i' || inqp->page_id[3] != 'd') > > return SCSI_DH_NOSYS; > > h->lun = inqp->lun[7]; /* Uses only the last byte */ > > + > > + for(i=0; i<ARRAY_LABEL_LEN-1; ++i) > > + *(array_name+i) = inqp->array_user_label[(2*i)+1]; > > + > > + *(array_name+ARRAY_LABEL_LEN-1) = '\0'; > > } > > return err; > > } > > @@ -410,7 +428,7 @@ static int check_ownership(struct scsi_d > > } > > > > static int initialize_controller(struct scsi_device *sdev, > > - struct rdac_dh_data *h) > > + struct rdac_dh_data *h, char *array_name) > > { > > int err; > > struct c4_inquiry *inqp; > > @@ -418,7 +436,8 @@ static int initialize_controller(struct > > err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h); > > if (err == SCSI_DH_OK) { > > inqp = &h->inq.c4; > > - h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id); > > + h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id, > > + array_name); > > if (!h->ctlr) > > err = SCSI_DH_RES_TEMP_UNAVAIL; > > } > > @@ -520,13 +539,14 @@ static int rdac_activate(struct scsi_dev > > { > > struct rdac_dh_data *h = get_rdac_data(sdev); > > int err = SCSI_DH_OK; > > + char array_name[ARRAY_LABEL_LEN]; > > > > err = check_ownership(sdev, h); > > if (err != SCSI_DH_OK) > > goto done; > > > > if (!h->ctlr) { > > - err = initialize_controller(sdev, h); > > + err = initialize_controller(sdev, h, array_name); > > if (err != SCSI_DH_OK) > > goto done; > > } > > @@ -656,6 +676,7 @@ static int rdac_bus_attach(struct scsi_d > > struct rdac_dh_data *h; > > unsigned long flags; > > int err; > > + char array_name[ARRAY_LABEL_LEN]; > > > > scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *) > > + sizeof(*h) , GFP_KERNEL); > > @@ -670,7 +691,7 @@ static int rdac_bus_attach(struct scsi_d > > h->lun = UNINITIALIZED_LUN; > > h->state = RDAC_STATE_ACTIVE; > > > > - err = get_lun(sdev, h); > > + err = get_lun_info(sdev, h, array_name); > > if (err != SCSI_DH_OK) > > goto failed; > > > > > > > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-scsi" > in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
