Re: [PATCH 2/3] cifs: handle multiple ip addresses per hostname

[kernel test robot <lkp@intel.com>]

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Hi Paulo,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on cifs/for-next]
[also build test WARNING on v5.13-rc1 next-20210511]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Paulo-Alcantara/Support-multiple-ips-per-hostname/20210512-003751
base:   git://git.samba.org/sfrench/cifs-2.6.git for-next
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/210f8e08a6bb153136929af6da6e0a7289ba5931
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Paulo-Alcantara/Support-multiple-ips-per-hostname/20210512-003751
        git checkout 210f8e08a6bb153136929af6da6e0a7289ba5931
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   fs/cifs/connect.c: In function 'cifs_create_socket':
   fs/cifs/connect.c:177:6: warning: variable 'slen' set but not used [-Wunused-but-set-variable]
     177 |  int slen, sfamily;
         |      ^~~~
   fs/cifs/connect.c: In function 'next_dfs_prepath':
>> fs/cifs/connect.c:3540:1: warning: the frame size of 2516 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    3540 | }
         | ^
   fs/cifs/connect.c: In function 'do_dfs_failover':
   fs/cifs/connect.c:3313:1: warning: the frame size of 2584 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    3313 | }
         | ^
--
   fs/cifs/dfs_cache.c: In function 'find_root_ses.isra.0':
>> fs/cifs/dfs_cache.c:1483:1: warning: the frame size of 2548 bytes is larger than 1024 bytes [-Wframe-larger-than=]
    1483 | }
         | ^


vim +3540 fs/cifs/connect.c

7efd081582619e Paulo Alcantara        2020-07-21  3497  
ff2c54a04097de Paulo Alcantara        2021-02-24  3498  /* Set up next dfs prefix path in @dfs_path */
ff2c54a04097de Paulo Alcantara        2021-02-24  3499  static int next_dfs_prepath(struct cifs_sb_info *cifs_sb, struct smb3_fs_context *ctx,
7efd081582619e Paulo Alcantara        2020-07-21  3500  			    const unsigned int xid, struct TCP_Server_Info *server,
7efd081582619e Paulo Alcantara        2020-07-21  3501  			    struct cifs_tcon *tcon, char **dfs_path)
56c762eb9bee33 Paulo Alcantara        2018-11-14  3502  {
ff2c54a04097de Paulo Alcantara        2021-02-24  3503  	char *path, *npath;
ff2c54a04097de Paulo Alcantara        2021-02-24  3504  	int added_treename = is_tcon_dfs(tcon);
ff2c54a04097de Paulo Alcantara        2021-02-24  3505  	int rc;
7efd081582619e Paulo Alcantara        2020-07-21  3506  
3fa1c6d1b8f5c3 Ronnie Sahlberg        2020-12-09  3507  	path = cifs_build_path_to_root(ctx, cifs_sb, tcon, added_treename);
7efd081582619e Paulo Alcantara        2020-07-21  3508  	if (!path)
7efd081582619e Paulo Alcantara        2020-07-21  3509  		return -ENOMEM;
ce558b0e17f8a6 Steve French           2018-05-31  3510  
ff2c54a04097de Paulo Alcantara        2021-02-24  3511  	rc = is_path_remote(cifs_sb, ctx, xid, server, tcon);
ff2c54a04097de Paulo Alcantara        2021-02-24  3512  	if (rc == -EREMOTE) {
3fa1c6d1b8f5c3 Ronnie Sahlberg        2020-12-09  3513  		struct smb3_fs_context v = {NULL};
7efd081582619e Paulo Alcantara        2020-07-21  3514  		/* if @path contains a tree name, skip it in the prefix path */
7efd081582619e Paulo Alcantara        2020-07-21  3515  		if (added_treename) {
66e7b09c731175 Ronnie Sahlberg        2020-11-05  3516  			rc = smb3_parse_devname(path, &v);
7efd081582619e Paulo Alcantara        2020-07-21  3517  			if (rc)
ff2c54a04097de Paulo Alcantara        2021-02-24  3518  				goto out;
7efd081582619e Paulo Alcantara        2020-07-21  3519  			npath = build_unc_path_to_root(&v, cifs_sb, true);
c741cba2cd1d14 Ronnie Sahlberg        2020-12-14  3520  			smb3_cleanup_fs_context_contents(&v);
7efd081582619e Paulo Alcantara        2020-07-21  3521  		} else {
3fa1c6d1b8f5c3 Ronnie Sahlberg        2020-12-09  3522  			v.UNC = ctx->UNC;
7efd081582619e Paulo Alcantara        2020-07-21  3523  			v.prepath = path + 1;
7efd081582619e Paulo Alcantara        2020-07-21  3524  			npath = build_unc_path_to_root(&v, cifs_sb, true);
5072010ccf0592 Paulo Alcantara (SUSE  2019-03-19  3525) 		}
ff2c54a04097de Paulo Alcantara        2021-02-24  3526  
7efd081582619e Paulo Alcantara        2020-07-21  3527  		if (IS_ERR(npath)) {
7efd081582619e Paulo Alcantara        2020-07-21  3528  			rc = PTR_ERR(npath);
ff2c54a04097de Paulo Alcantara        2021-02-24  3529  			goto out;
a6b5058fafdf50 Aurelien Aptel         2016-05-25  3530  		}
ff2c54a04097de Paulo Alcantara        2021-02-24  3531  
7efd081582619e Paulo Alcantara        2020-07-21  3532  		kfree(*dfs_path);
7efd081582619e Paulo Alcantara        2020-07-21  3533  		*dfs_path = npath;
ff2c54a04097de Paulo Alcantara        2021-02-24  3534  		rc = -EREMOTE;
1bfe73c258addc Igor Mammedov          2009-04-01  3535  	}
1bfe73c258addc Igor Mammedov          2009-04-01  3536  
ff2c54a04097de Paulo Alcantara        2021-02-24  3537  out:
7efd081582619e Paulo Alcantara        2020-07-21  3538  	kfree(path);
7efd081582619e Paulo Alcantara        2020-07-21  3539  	return rc;
4a367dc0443566 Paulo Alcantara        2018-11-14 @3540  }
4a367dc0443566 Paulo Alcantara        2018-11-14  3541  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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