linux-kernel - Re: [PATCH] orangefs: Adding new return type vm_fault

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Date:   Fri, 6 Jul 2018 10:05:14 -0400
From:   Mike Marshall <hubcap@...ibond.com>
To:     Souptick Joarder <jrdr.linux@...il.com>
Cc:     Matthew Wilcox <willy@...radead.org>,
        Martin Brandenburg <martin@...ibond.com>,
        devel@...ts.orangefs.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] orangefs: Adding new return type vm_fault_t

Souptick Joarder: Any comment for this patch?

Thanks for sending it <g>...

I have it in my stack, but I haven't studied it, or xfstested it yet, so
no useful comments yet...

-Mike



On Fri, Jul 6, 2018 at 2:44 AM, Souptick Joarder <jrdr.linux@...il.com> wrote:
> On Fri, Jun 29, 2018 at 12:12 AM, Souptick Joarder <jrdr.linux@...il.com> wrote:
>> Use new return type vm_fault_t for fault handler. For now,
>> this is just documenting that the function returns a VM_FAULT
>> value rather than an errno. Once all instances are converted,
>> vm_fault_t will become a distinct type.
>>
>> See the following
>> commit 1c8f422059ae ("mm: change return type to vm_fault_t")
>>
>> Fixed checkpatch.pl warning.
>>
>> Signed-off-by: Souptick Joarder <jrdr.linux@...il.com>
>> ---
>>  fs/orangefs/file.c | 19 ++++++++++---------
>>  1 file changed, 10 insertions(+), 9 deletions(-)
>>
>> diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
>> index db0b521..a5a2fe7 100644
>> --- a/fs/orangefs/file.c
>> +++ b/fs/orangefs/file.c
>> @@ -528,18 +528,19 @@ static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long ar
>>         return ret;
>>  }
>>
>> -static int orangefs_fault(struct vm_fault *vmf)
>> +static vm_fault_t orangefs_fault(struct vm_fault *vmf)
>>  {
>>         struct file *file = vmf->vma->vm_file;
>> -       int rc;
>> -       rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
>> +       int ret;
>> +
>> +       ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
>>             STATX_SIZE);
>> -       if (rc == -ESTALE)
>> -               rc = -EIO;
>> -       if (rc) {
>> -               gossip_err("%s: orangefs_inode_getattr failed, "
>> -                   "rc:%d:.\n", __func__, rc);
>> -               return rc;
>> +       if (ret == -ESTALE)
>> +               ret = -EIO;
>> +       if (ret) {
>> +               gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
>> +                               __func__, ret);
>> +               return VM_FAULT_SIGBUS;
>>         }
>>         return filemap_fault(vmf);
>>  }
>> --
>> 1.9.1
>>
>
> Any comment for this patch ?