2020-07-13 07:50:17

by Lee Jones

Subject: [PATCH v2 02/29] include: scsi: scsi_transport_fc: Match HBA Attribute Length with HBAAPI V2.0 definitions

According to 'include/scsi/scsi_transport_fc.h':

"Attributes are based on HBAAPI V2.0 definitions"

... so it seems sane to match the 'HBA Attribute Length' to them.

If we don't, the compiler complains that the copied data will be truncated.

Fixes the following W=1 kernel build warning(s):

In file included from include/linux/bitmap.h:9,
from include/linux/cpumask.h:12,
from include/linux/smp.h:13,
from include/linux/percpu.h:7,
from include/scsi/libfc.h:13,
from drivers/scsi/libfc/fc_elsct.c:17:
In function ‘strncpy’,
inlined from ‘fc_ct_ms_fill.constprop’ at include/scsi/fc_encode.h:263:3:
include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 79 [-Wstringop-truncation]
297 | #define __underlying_strncpy __builtin_strncpy
| ^
include/linux/string.h:307:9: note: in expansion of macro ‘__underlying_strncpy’
307 | return __underlying_strncpy(p, q, size);
| ^~~~~~~~~~~~~~~~~~~~
In function ‘strncpy’,
inlined from ‘fc_ct_ms_fill.constprop’ at include/scsi/fc_encode.h:275:3:
include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 79 [-Wstringop-truncation]
297 | #define __underlying_strncpy __builtin_strncpy
| ^
include/linux/string.h:307:9: note: in expansion of macro ‘__underlying_strncpy’
307 | return __underlying_strncpy(p, q, size);
| ^~~~~~~~~~~~~~~~~~~~

Signed-off-by: Lee Jones <[email protected]>
---
include/scsi/fc/fc_ms.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/scsi/fc/fc_ms.h b/include/scsi/fc/fc_ms.h
index 800d53dc94705..9e273fed0a85f 100644
--- a/include/scsi/fc/fc_ms.h
+++ b/include/scsi/fc/fc_ms.h
@@ -63,8 +63,8 @@ enum fc_fdmi_hba_attr_type {
* HBA Attribute Length
*/
#define FC_FDMI_HBA_ATTR_NODENAME_LEN 8
-#define FC_FDMI_HBA_ATTR_MANUFACTURER_LEN 64
-#define FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN 64
+#define FC_FDMI_HBA_ATTR_MANUFACTURER_LEN 80
+#define FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN 80
#define FC_FDMI_HBA_ATTR_MODEL_LEN 256
#define FC_FDMI_HBA_ATTR_MODELDESCR_LEN 256
#define FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN 256
--
2.25.1

2020-07-14 06:51:05

by Hannes Reinecke

Subject: Re: [PATCH v2 02/29] include: scsi: scsi_transport_fc: Match HBA Attribute Length with HBAAPI V2.0 definitions

On 7/13/20 9:46 AM, Lee Jones wrote:
> According to 'include/scsi/scsi_transport_fc.h':
>
> "Attributes are based on HBAAPI V2.0 definitions"
>
> ... so it seems sane to match the 'HBA Attribute Length' to them.
>
> If we don't, the compiler complains that the copied data will be truncated.
>
> Fixes the following W=1 kernel build warning(s):
>
> In file included from include/linux/bitmap.h:9,
> from include/linux/cpumask.h:12,
> from include/linux/smp.h:13,
> from include/linux/percpu.h:7,
> from include/scsi/libfc.h:13,
> from drivers/scsi/libfc/fc_elsct.c:17:
> In function ‘strncpy’,
> inlined from ‘fc_ct_ms_fill.constprop’ at include/scsi/fc_encode.h:263:3:
> include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 79 [-Wstringop-truncation]
> 297 | #define __underlying_strncpy __builtin_strncpy
> | ^
> include/linux/string.h:307:9: note: in expansion of macro ‘__underlying_strncpy’
> 307 | return __underlying_strncpy(p, q, size);
> | ^~~~~~~~~~~~~~~~~~~~
> In function ‘strncpy’,
> inlined from ‘fc_ct_ms_fill.constprop’ at include/scsi/fc_encode.h:275:3:
> include/linux/string.h:297:30: warning: ‘__builtin_strncpy’ output may be truncated copying 64 bytes from a string of length 79 [-Wstringop-truncation]
> 297 | #define __underlying_strncpy __builtin_strncpy
> | ^
> include/linux/string.h:307:9: note: in expansion of macro ‘__underlying_strncpy’
> 307 | return __underlying_strncpy(p, q, size);
> | ^~~~~~~~~~~~~~~~~~~~
>
> Signed-off-by: Lee Jones <[email protected]>
> ---
> include/scsi/fc/fc_ms.h | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/include/scsi/fc/fc_ms.h b/include/scsi/fc/fc_ms.h
> index 800d53dc94705..9e273fed0a85f 100644
> --- a/include/scsi/fc/fc_ms.h
> +++ b/include/scsi/fc/fc_ms.h
> @@ -63,8 +63,8 @@ enum fc_fdmi_hba_attr_type {
> * HBA Attribute Length
> */
> #define FC_FDMI_HBA_ATTR_NODENAME_LEN 8
> -#define FC_FDMI_HBA_ATTR_MANUFACTURER_LEN 64
> -#define FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN 64
> +#define FC_FDMI_HBA_ATTR_MANUFACTURER_LEN 80
> +#define FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN 80
> #define FC_FDMI_HBA_ATTR_MODEL_LEN 256
> #define FC_FDMI_HBA_ATTR_MODELDESCR_LEN 256
> #define FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN 256
>
Reviewed-by: Hannes Reinecke <[email protected]>

Cheers,

Hannes
--
Dr. Hannes Reinecke Teamlead Storage & Networking
[email protected] +49 911 74053 688
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