linux-kernel - Re: [PATCH] cifs: cifsacl: Use a temporary ops variable to reduce code length

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Message-ID: <CAH2r5muPkALa5Q_DxfHfbNeV0KxvWw-UUuSeJm502MPMdkgoyw@mail.gmail.com>
Date:   Fri, 12 May 2017 19:57:14 -0500
From:   Steve French <smfrench@...il.com>
To:     Shirish Pargaonkar <shirishpargaonkar@...il.com>
Cc:     Joe Perches <joe@...ches.com>, Steve French <sfrench@...ba.org>,
        linux-cifs <linux-cifs@...r.kernel.org>,
        samba-technical <samba-technical@...ts.samba.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cifs: cifsacl: Use a temporary ops variable to reduce
 code length

merged into cifs-2.6.git for-next

On Tue, May 9, 2017 at 11:26 PM, Shirish Pargaonkar
<shirishpargaonkar@...il.com> wrote:
> Looks correct.
>
> Acked-by: Shirish Pargaonkar <shirishpargaonkar@...il.com>
>
> On Sun, May 7, 2017 at 3:31 AM, Joe Perches via samba-technical
> <samba-technical@...ts.samba.org> wrote:
>> Create an ops variable to store tcon->ses->server->ops and cache
>> indirections and reduce code size a trivial bit.
>>
>> $ size fs/cifs/cifsacl.o*
>>    text    data     bss     dec     hex filename
>>    5338     136       8    5482    156a fs/cifs/cifsacl.o.new
>>    5371     136       8    5515    158b fs/cifs/cifsacl.o.old
>>
>> Signed-off-by: Joe Perches <joe@...ches.com>
>> ---
>>  fs/cifs/cifsacl.c | 30 ++++++++++++++----------------
>>  1 file changed, 14 insertions(+), 16 deletions(-)
>>
>> diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
>> index 15bac390dff9..b98436f5c7c7 100644
>> --- a/fs/cifs/cifsacl.c
>> +++ b/fs/cifs/cifsacl.c
>> @@ -1135,20 +1135,19 @@ cifs_acl_to_fattr(struct cifs_sb_info *cifs_sb, struct cifs_fattr *fattr,
>>         u32 acllen = 0;
>>         int rc = 0;
>>         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
>> -       struct cifs_tcon *tcon;
>> +       struct smb_version_operations *ops;
>>
>>         cifs_dbg(NOISY, "converting ACL to mode for %s\n", path);
>>
>>         if (IS_ERR(tlink))
>>                 return PTR_ERR(tlink);
>> -       tcon = tlink_tcon(tlink);
>>
>> -       if (pfid && (tcon->ses->server->ops->get_acl_by_fid))
>> -               pntsd = tcon->ses->server->ops->get_acl_by_fid(cifs_sb, pfid,
>> -                                                         &acllen);
>> -       else if (tcon->ses->server->ops->get_acl)
>> -               pntsd = tcon->ses->server->ops->get_acl(cifs_sb, inode, path,
>> -                                                       &acllen);
>> +       ops = tlink_tcon(tlink)->ses->server->ops;
>> +
>> +       if (pfid && (ops->get_acl_by_fid))
>> +               pntsd = ops->get_acl_by_fid(cifs_sb, pfid, &acllen);
>> +       else if (ops->get_acl)
>> +               pntsd = ops->get_acl(cifs_sb, inode, path, &acllen);
>>         else {
>>                 cifs_put_tlink(tlink);
>>                 return -EOPNOTSUPP;
>> @@ -1181,23 +1180,23 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode,
>>         struct cifs_ntsd *pnntsd = NULL; /* modified acl to be sent to server */
>>         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
>>         struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
>> -       struct cifs_tcon *tcon;
>> +       struct smb_version_operations *ops;
>>
>>         if (IS_ERR(tlink))
>>                 return PTR_ERR(tlink);
>> -       tcon = tlink_tcon(tlink);
>> +
>> +       ops = tlink_tcon(tlink)->ses->server->ops;
>>
>>         cifs_dbg(NOISY, "set ACL from mode for %s\n", path);
>>
>>         /* Get the security descriptor */
>>
>> -       if (tcon->ses->server->ops->get_acl == NULL) {
>> +       if (ops->get_acl == NULL) {
>>                 cifs_put_tlink(tlink);
>>                 return -EOPNOTSUPP;
>>         }
>>
>> -       pntsd = tcon->ses->server->ops->get_acl(cifs_sb, inode, path,
>> -                                               &secdesclen);
>> +       pntsd = ops->get_acl(cifs_sb, inode, path, &secdesclen);
>>         if (IS_ERR(pntsd)) {
>>                 rc = PTR_ERR(pntsd);
>>                 cifs_dbg(VFS, "%s: error %d getting sec desc\n", __func__, rc);
>> @@ -1224,13 +1223,12 @@ id_mode_to_cifs_acl(struct inode *inode, const char *path, __u64 nmode,
>>
>>         cifs_dbg(NOISY, "build_sec_desc rc: %d\n", rc);
>>
>> -       if (tcon->ses->server->ops->set_acl == NULL)
>> +       if (ops->set_acl == NULL)
>>                 rc = -EOPNOTSUPP;
>>
>>         if (!rc) {
>>                 /* Set the security descriptor */
>> -               rc = tcon->ses->server->ops->set_acl(pnntsd, secdesclen, inode,
>> -                                                    path, aclflag);
>> +               rc = ops->set_acl(pnntsd, secdesclen, inode, path, aclflag);
>>                 cifs_dbg(NOISY, "set_cifs_acl rc: %d\n", rc);
>>         }
>>         cifs_put_tlink(tlink);
>> --
>> 2.10.0.rc2.1.g053435c
>>
>>
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-- 
Thanks,

Steve