* [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
@ 2019-01-31 0:46 Gustavo A. R. Silva
2019-01-31 14:11 ` Chuck Lever
0 siblings, 1 reply; 9+ messages in thread
From: Gustavo A. R. Silva @ 2019-01-31 0:46 UTC (permalink / raw)
To: Trond Myklebust, Anna Schumaker, J. Bruce Fields, Jeff Layton,
David S. Miller
Cc: linux-nfs, netdev, linux-kernel, Gustavo A. R. Silva
One of the more common cases of allocation size calculations is finding
the size of a structure that has a zero-sized array at the end, along
with memory for some number of elements for that array. For example:
struct foo {
int stuff;
struct boo entry[];
};
instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can
now use the new struct_size() helper:
instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
This code was detected with the help of Coccinelle.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
net/sunrpc/xprtrdma/verbs.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
index 4994e75945b8..9e8cf7456840 100644
--- a/net/sunrpc/xprtrdma/verbs.c
+++ b/net/sunrpc/xprtrdma/verbs.c
@@ -811,8 +811,7 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
{
struct rpcrdma_sendctx *sc;
- sc = kzalloc(sizeof(*sc) +
- ia->ri_max_send_sges * sizeof(struct ib_sge),
+ sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
GFP_KERNEL);
if (!sc)
return NULL;
--
2.20.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-01-31 0:46 [PATCH net-next] xprtrdma: Use struct_size() in kzalloc() Gustavo A. R. Silva
@ 2019-01-31 14:11 ` Chuck Lever
2019-02-08 3:49 ` Gustavo A. R. Silva
2019-03-28 20:41 ` Gustavo A. R. Silva
0 siblings, 2 replies; 9+ messages in thread
From: Chuck Lever @ 2019-01-31 14:11 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Trond Myklebust, Anna Schumaker, Bruce Fields, Jeff Layton,
David S. Miller, Linux NFS Mailing List, netdev, linux-kernel
> On Jan 30, 2019, at 7:46 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>
> One of the more common cases of allocation size calculations is finding
> the size of a structure that has a zero-sized array at the end, along
> with memory for some number of elements for that array. For example:
>
> struct foo {
> int stuff;
> struct boo entry[];
> };
>
> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
>
> Instead of leaving these open-coded and prone to type mistakes, we can
> now use the new struct_size() helper:
>
> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
> ---
> net/sunrpc/xprtrdma/verbs.c | 3 +--
> 1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
> index 4994e75945b8..9e8cf7456840 100644
> --- a/net/sunrpc/xprtrdma/verbs.c
> +++ b/net/sunrpc/xprtrdma/verbs.c
> @@ -811,8 +811,7 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
> {
> struct rpcrdma_sendctx *sc;
>
> - sc = kzalloc(sizeof(*sc) +
> - ia->ri_max_send_sges * sizeof(struct ib_sge),
> + sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
> GFP_KERNEL);
> if (!sc)
> return NULL;
> --
> 2.20.1
>
--
Chuck Lever
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-01-31 14:11 ` Chuck Lever
@ 2019-02-08 3:49 ` Gustavo A. R. Silva
2019-03-28 20:41 ` Gustavo A. R. Silva
1 sibling, 0 replies; 9+ messages in thread
From: Gustavo A. R. Silva @ 2019-02-08 3:49 UTC (permalink / raw)
To: Chuck Lever
Cc: Trond Myklebust, Anna Schumaker, Bruce Fields, Jeff Layton,
David S. Miller, Linux NFS Mailing List, netdev, linux-kernel
On 1/31/19 8:11 AM, Chuck Lever wrote:
>
>
>> On Jan 30, 2019, at 7:46 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>>
>> One of the more common cases of allocation size calculations is finding
>> the size of a structure that has a zero-sized array at the end, along
>> with memory for some number of elements for that array. For example:
>>
>> struct foo {
>> int stuff;
>> struct boo entry[];
>> };
>>
>> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
>>
>> Instead of leaving these open-coded and prone to type mistakes, we can
>> now use the new struct_size() helper:
>>
>> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
>>
>> This code was detected with the help of Coccinelle.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>
> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
>
Thanks, Chuck.
--
Gustavo
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-01-31 14:11 ` Chuck Lever
2019-02-08 3:49 ` Gustavo A. R. Silva
@ 2019-03-28 20:41 ` Gustavo A. R. Silva
2019-05-23 22:36 ` Gustavo A. R. Silva
1 sibling, 1 reply; 9+ messages in thread
From: Gustavo A. R. Silva @ 2019-03-28 20:41 UTC (permalink / raw)
To: Chuck Lever
Cc: Trond Myklebust, Anna Schumaker, Bruce Fields, Jeff Layton,
David S. Miller, Linux NFS Mailing List, netdev, linux-kernel
Hi all,
Friendly ping:
Who can take this?
Thanks
--
Gustavo
On 1/31/19 8:11 AM, Chuck Lever wrote:
>
>
>> On Jan 30, 2019, at 7:46 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>>
>> One of the more common cases of allocation size calculations is finding
>> the size of a structure that has a zero-sized array at the end, along
>> with memory for some number of elements for that array. For example:
>>
>> struct foo {
>> int stuff;
>> struct boo entry[];
>> };
>>
>> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
>>
>> Instead of leaving these open-coded and prone to type mistakes, we can
>> now use the new struct_size() helper:
>>
>> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
>>
>> This code was detected with the help of Coccinelle.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>
> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
>
>
>> ---
>> net/sunrpc/xprtrdma/verbs.c | 3 +--
>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>
>> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
>> index 4994e75945b8..9e8cf7456840 100644
>> --- a/net/sunrpc/xprtrdma/verbs.c
>> +++ b/net/sunrpc/xprtrdma/verbs.c
>> @@ -811,8 +811,7 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
>> {
>> struct rpcrdma_sendctx *sc;
>>
>> - sc = kzalloc(sizeof(*sc) +
>> - ia->ri_max_send_sges * sizeof(struct ib_sge),
>> + sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
>> GFP_KERNEL);
>> if (!sc)
>> return NULL;
>> --
>> 2.20.1
>>
>
> --
> Chuck Lever
>
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-03-28 20:41 ` Gustavo A. R. Silva
@ 2019-05-23 22:36 ` Gustavo A. R. Silva
2019-05-23 23:02 ` Chuck Lever
2019-05-23 23:32 ` David Miller
0 siblings, 2 replies; 9+ messages in thread
From: Gustavo A. R. Silva @ 2019-05-23 22:36 UTC (permalink / raw)
To: Chuck Lever
Cc: Trond Myklebust, Anna Schumaker, Bruce Fields, Jeff Layton,
David S. Miller, Linux NFS Mailing List, netdev, linux-kernel
Hi Dave,
I wonder if you can take this patch.
Thanks
--
Gustavo
On 3/28/19 3:41 PM, Gustavo A. R. Silva wrote:
> Hi all,
>
> Friendly ping:
>
> Who can take this?
>
> Thanks
> --
> Gustavo
>
> On 1/31/19 8:11 AM, Chuck Lever wrote:
>>
>>
>>> On Jan 30, 2019, at 7:46 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>>>
>>> One of the more common cases of allocation size calculations is finding
>>> the size of a structure that has a zero-sized array at the end, along
>>> with memory for some number of elements for that array. For example:
>>>
>>> struct foo {
>>> int stuff;
>>> struct boo entry[];
>>> };
>>>
>>> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
>>>
>>> Instead of leaving these open-coded and prone to type mistakes, we can
>>> now use the new struct_size() helper:
>>>
>>> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
>>>
>>> This code was detected with the help of Coccinelle.
>>>
>>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>>
>> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
>>
>>
>>> ---
>>> net/sunrpc/xprtrdma/verbs.c | 3 +--
>>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>>
>>> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
>>> index 4994e75945b8..9e8cf7456840 100644
>>> --- a/net/sunrpc/xprtrdma/verbs.c
>>> +++ b/net/sunrpc/xprtrdma/verbs.c
>>> @@ -811,8 +811,7 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
>>> {
>>> struct rpcrdma_sendctx *sc;
>>>
>>> - sc = kzalloc(sizeof(*sc) +
>>> - ia->ri_max_send_sges * sizeof(struct ib_sge),
>>> + sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
>>> GFP_KERNEL);
>>> if (!sc)
>>> return NULL;
>>> --
>>> 2.20.1
>>>
>>
>> --
>> Chuck Lever
>>
>>
>>
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-05-23 22:36 ` Gustavo A. R. Silva
@ 2019-05-23 23:02 ` Chuck Lever
2019-05-23 23:32 ` David Miller
1 sibling, 0 replies; 9+ messages in thread
From: Chuck Lever @ 2019-05-23 23:02 UTC (permalink / raw)
To: Gustavo A. R. Silva, Anna Schumaker
Cc: Trond Myklebust, Bruce Fields, Jeff Layton, David S. Miller,
Linux NFS Mailing List, netdev, Linux Kernel Mailing List
Hi Gustavo-
Anna is supposed to take patches for xprtrdma/ .
> On May 23, 2019, at 6:36 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>
> Hi Dave,
>
> I wonder if you can take this patch.
>
> Thanks
> --
> Gustavo
>
> On 3/28/19 3:41 PM, Gustavo A. R. Silva wrote:
>> Hi all,
>>
>> Friendly ping:
>>
>> Who can take this?
>>
>> Thanks
>> --
>> Gustavo
>>
>> On 1/31/19 8:11 AM, Chuck Lever wrote:
>>>
>>>
>>>> On Jan 30, 2019, at 7:46 PM, Gustavo A. R. Silva <gustavo@embeddedor.com> wrote:
>>>>
>>>> One of the more common cases of allocation size calculations is finding
>>>> the size of a structure that has a zero-sized array at the end, along
>>>> with memory for some number of elements for that array. For example:
>>>>
>>>> struct foo {
>>>> int stuff;
>>>> struct boo entry[];
>>>> };
>>>>
>>>> instance = kzalloc(sizeof(struct foo) + count * sizeof(struct boo), GFP_KERNEL);
>>>>
>>>> Instead of leaving these open-coded and prone to type mistakes, we can
>>>> now use the new struct_size() helper:
>>>>
>>>> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL);
>>>>
>>>> This code was detected with the help of Coccinelle.
>>>>
>>>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>>>
>>> Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
>>>
>>>
>>>> ---
>>>> net/sunrpc/xprtrdma/verbs.c | 3 +--
>>>> 1 file changed, 1 insertion(+), 2 deletions(-)
>>>>
>>>> diff --git a/net/sunrpc/xprtrdma/verbs.c b/net/sunrpc/xprtrdma/verbs.c
>>>> index 4994e75945b8..9e8cf7456840 100644
>>>> --- a/net/sunrpc/xprtrdma/verbs.c
>>>> +++ b/net/sunrpc/xprtrdma/verbs.c
>>>> @@ -811,8 +811,7 @@ static struct rpcrdma_sendctx *rpcrdma_sendctx_create(struct rpcrdma_ia *ia)
>>>> {
>>>> struct rpcrdma_sendctx *sc;
>>>>
>>>> - sc = kzalloc(sizeof(*sc) +
>>>> - ia->ri_max_send_sges * sizeof(struct ib_sge),
>>>> + sc = kzalloc(struct_size(sc, sc_sges, ia->ri_max_send_sges),
>>>> GFP_KERNEL);
>>>> if (!sc)
>>>> return NULL;
>>>> --
>>>> 2.20.1
>>>>
>>>
>>> --
>>> Chuck Lever
>>>
>>>
>>>
--
Chuck Lever
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-05-23 22:36 ` Gustavo A. R. Silva
2019-05-23 23:02 ` Chuck Lever
@ 2019-05-23 23:32 ` David Miller
2019-05-23 23:43 ` Gustavo A. R. Silva
1 sibling, 1 reply; 9+ messages in thread
From: David Miller @ 2019-05-23 23:32 UTC (permalink / raw)
To: gustavo
Cc: chuck.lever, trond.myklebust, anna.schumaker, bfields, jlayton,
linux-nfs, netdev, linux-kernel
From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
Date: Thu, 23 May 2019 17:36:00 -0500
> Hi Dave,
>
> I wonder if you can take this patch.
The sunrpc/nfs maintainer should take this. I never take patches in that
area.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-05-23 23:32 ` David Miller
@ 2019-05-23 23:43 ` Gustavo A. R. Silva
2019-05-28 13:56 ` Schumaker, Anna
0 siblings, 1 reply; 9+ messages in thread
From: Gustavo A. R. Silva @ 2019-05-23 23:43 UTC (permalink / raw)
To: David Miller
Cc: chuck.lever, trond.myklebust, anna.schumaker, bfields, jlayton,
linux-nfs, netdev, linux-kernel
On 5/23/19 6:32 PM, David Miller wrote:
> From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
> Date: Thu, 23 May 2019 17:36:00 -0500
>
>> Hi Dave,
>>
>> I wonder if you can take this patch.
>
> The sunrpc/nfs maintainer should take this. I never take patches in that
> area.
>
Yep. Chuck just let me know that Anna is who take these patches.
Hopefully, she will take this one soon.
Thanks
--
Gustavo
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH net-next] xprtrdma: Use struct_size() in kzalloc()
2019-05-23 23:43 ` Gustavo A. R. Silva
@ 2019-05-28 13:56 ` Schumaker, Anna
0 siblings, 0 replies; 9+ messages in thread
From: Schumaker, Anna @ 2019-05-28 13:56 UTC (permalink / raw)
To: davem, gustavo
Cc: bfields, linux-nfs, jlayton, netdev, trond.myklebust,
chuck.lever, linux-kernel
On Thu, 2019-05-23 at 18:43 -0500, Gustavo A. R. Silva wrote:
>
> On 5/23/19 6:32 PM, David Miller wrote:
> > From: "Gustavo A. R. Silva" <gustavo@embeddedor.com>
> > Date: Thu, 23 May 2019 17:36:00 -0500
> >
> > > Hi Dave,
> > >
> > > I wonder if you can take this patch.
> >
> > The sunrpc/nfs maintainer should take this. I never take patches in that
> > area.
> >
>
> Yep. Chuck just let me know that Anna is who take these patches.
>
> Hopefully, she will take this one soon.
I've applied this to push out later in the week. Thanks for pointing it out to
me!
Anna
>
> Thanks
> --
> Gustavo
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-05-28 13:56 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-01-31 0:46 [PATCH net-next] xprtrdma: Use struct_size() in kzalloc() Gustavo A. R. Silva
2019-01-31 14:11 ` Chuck Lever
2019-02-08 3:49 ` Gustavo A. R. Silva
2019-03-28 20:41 ` Gustavo A. R. Silva
2019-05-23 22:36 ` Gustavo A. R. Silva
2019-05-23 23:02 ` Chuck Lever
2019-05-23 23:32 ` David Miller
2019-05-23 23:43 ` Gustavo A. R. Silva
2019-05-28 13:56 ` Schumaker, Anna
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