Re: [PATCH v3 1/1] ceph: add getvxattr op

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

Hi Milind,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on fd84bfdddd169c219c3a637889a8b87f70a072c2]

url:    https://github.com/0day-ci/linux/commits/Milind-Changire/ceph-add-support-for-getvxattr-op/20220117-120129
base:   fd84bfdddd169c219c3a637889a8b87f70a072c2
config: x86_64-randconfig-r002-20220117 (https://download.01.org/0day-ci/archive/20220117/202201171516.ilKzMFxt-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 5f782d25a742302d25ef3c8b84b54f7483c2deb9)
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/2c3b424994ab41a8d52471eb5a6721f466d515dc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Milind-Changire/ceph-add-support-for-getvxattr-op/20220117-120129
        git checkout 2c3b424994ab41a8d52471eb5a6721f466d515dc
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash fs/ceph/

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/ceph/inode.c:2326:53: warning: format specifies type 'unsigned int' but the argument has type 'size_t' (aka 'unsigned long') [-Wformat]
           dout("do_getvxattr xattr_value_len:%u, size:%u\n", xattr_value_len, size);
                                              ~~              ^~~~~~~~~~~~~~~
                                              %lu
   include/linux/ceph/ceph_debug.h:26:29: note: expanded from macro 'dout'
                           printk(KERN_DEBUG fmt, ##__VA_ARGS__);  \
                                             ~~~    ^~~~~~~~~~~
   include/linux/printk.h:450:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:422:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   fs/ceph/inode.c:2326:70: warning: format specifies type 'unsigned int' but the argument has type 'size_t' (aka 'unsigned long') [-Wformat]
           dout("do_getvxattr xattr_value_len:%u, size:%u\n", xattr_value_len, size);
                                                       ~~                      ^~~~
                                                       %lu
   include/linux/ceph/ceph_debug.h:26:29: note: expanded from macro 'dout'
                           printk(KERN_DEBUG fmt, ##__VA_ARGS__);  \
                                             ~~~    ^~~~~~~~~~~
   include/linux/printk.h:450:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:422:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   2 warnings generated.


vim +2326 fs/ceph/inode.c

  2293	
  2294	int ceph_do_getvxattr(struct inode *inode, const char *name, void *value,
  2295			      size_t size)
  2296	{
  2297		struct ceph_fs_client *fsc = ceph_sb_to_client(inode->i_sb);
  2298		struct ceph_mds_client *mdsc = fsc->mdsc;
  2299		struct ceph_mds_request *req;
  2300		int mode = USE_AUTH_MDS;
  2301		int err;
  2302		char *xattr_value;
  2303		size_t xattr_value_len;
  2304	
  2305		req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_GETVXATTR, mode);
  2306		if (IS_ERR(req)) {
  2307			err = -ENOMEM;
  2308			goto out;
  2309		}
  2310	
  2311		req->r_path2 = kstrdup(name, GFP_NOFS);
  2312		if (!req->r_path2) {
  2313			err = -ENOMEM;
  2314			goto put;
  2315		}
  2316	
  2317		ihold(inode);
  2318		req->r_inode = inode;
  2319		err = ceph_mdsc_do_request(mdsc, NULL, req);
  2320		if (err < 0)
  2321			goto put;
  2322	
  2323		xattr_value = req->r_reply_info.xattr_info.xattr_value;
  2324		xattr_value_len = req->r_reply_info.xattr_info.xattr_value_len;
  2325	
> 2326		dout("do_getvxattr xattr_value_len:%u, size:%u\n", xattr_value_len, size);
  2327	
  2328		err = xattr_value_len;
  2329		if (size == 0)
  2330			goto put;
  2331	
  2332		if (xattr_value_len > size) {
  2333			err = -ERANGE;
  2334			goto put;
  2335		}
  2336	
  2337		memcpy(value, xattr_value, xattr_value_len);
  2338	put:
  2339		ceph_mdsc_put_request(req);
  2340	out:
  2341		dout("do_getvxattr result=%d\n", err);
  2342		return err;
  2343	}
  2344	

---
0-DAY CI Kernel Test Service, Intel Corporation
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