Re: [RFC PATCH 12/19] famfs_fuse: Plumb the GET_FMAP message/response

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

Hi John,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on 38fec10eb60d687e30c8c6b5420d86e8149f7557]

url:    https://github.com/intel-lab-lkp/linux/commits/John-Groves/dev_dax_iomap-Move-dax_pgoff_to_phys-from-device-c-to-bus-c/20250421-094020
base:   38fec10eb60d687e30c8c6b5420d86e8149f7557
patch link:    https://lore.kernel.org/r/20250421013346.32530-13-john%40groves.net
patch subject: [RFC PATCH 12/19] famfs_fuse: Plumb the GET_FMAP message/response
config: csky-randconfig-001-20250421 (https://download.01.org/0day-ci/archive/20250421/202504211139.nywCKgmL-lkp@intel.com/config)
compiler: csky-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250421/202504211139.nywCKgmL-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202504211139.nywCKgmL-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from include/asm-generic/bug.h:22,
                    from arch/csky/include/asm/bug.h:18,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from include/asm-generic/preempt.h:5,
                    from ./arch/csky/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:79,
                    from include/linux/spinlock.h:56,
                    from include/linux/wait.h:9,
                    from include/linux/wait_bit.h:8,
                    from include/linux/fs.h:6,
                    from fs/fuse/fuse_i.h:17,
                    from fs/fuse/dir.c:9:
   fs/fuse/dir.c: In function 'fuse_get_fmap':
>> fs/fuse/dir.c:392:27: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     392 |                   nodeid, (u64)inode);
         |                           ^
   include/linux/printk.h:473:33: note: in definition of macro 'printk_index_wrap'
     473 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                                 ^~~~~~~~~~~
   include/linux/printk.h:564:9: note: in expansion of macro 'printk'
     564 |         printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   fs/fuse/dir.c:391:9: note: in expansion of macro 'pr_notice'
     391 |         pr_notice("%s: nodeid=%lld, inode=%llx\n", __func__,
         |         ^~~~~~~~~
   include/linux/kern_levels.h:5:25: warning: format '%ld' expects argument of type 'long int', but argument 4 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
       5 | #define KERN_SOH        "\001"          /* ASCII Start Of Header */
         |                         ^~~~~~
   include/linux/printk.h:473:25: note: in definition of macro 'printk_index_wrap'
     473 |                 _p_func(_fmt, ##__VA_ARGS__);                           \
         |                         ^~~~
   include/linux/printk.h:564:9: note: in expansion of macro 'printk'
     564 |         printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~
   include/linux/kern_levels.h:13:25: note: in expansion of macro 'KERN_SOH'
      13 | #define KERN_NOTICE     KERN_SOH "5"    /* normal but significant condition */
         |                         ^~~~~~~~
   include/linux/printk.h:564:16: note: in expansion of macro 'KERN_NOTICE'
     564 |         printk(KERN_NOTICE pr_fmt(fmt), ##__VA_ARGS__)
         |                ^~~~~~~~~~~
   fs/fuse/dir.c:406:9: note: in expansion of macro 'pr_notice'
     406 |         pr_notice("%s: nodei=%lld fmap_size=%ld\n", __func__, nodeid, fmap_size);
         |         ^~~~~~~~~

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for DEV_DAX_IOMAP
   Depends on [n]: DEV_DAX [=n] && DAX [=y]
   Selected by [y]:
   - FUSE_FAMFS_DAX [=y] && FUSE_FS [=y]


vim +392 fs/fuse/dir.c

   383	
   384	static int
   385	fuse_get_fmap(struct fuse_mount *fm, struct inode *inode, u64 nodeid)
   386	{
   387		size_t fmap_size;
   388		void *fmap_buf;
   389		int err;
   390	
   391		pr_notice("%s: nodeid=%lld, inode=%llx\n", __func__,
 > 392			  nodeid, (u64)inode);
   393		fmap_buf = kcalloc(1, FMAP_BUFSIZE, GFP_KERNEL);
   394		FUSE_ARGS(args);
   395		fuse_get_fmap_init(fm->fc, &args, nodeid, fmap_buf, FMAP_BUFSIZE);
   396	
   397		/* Send GET_FMAP command */
   398		err = fuse_simple_request(fm, &args);
   399		if (err) {
   400			pr_err("%s: err=%d from fuse_simple_request()\n",
   401			       __func__, err);
   402			return err;
   403		}
   404	
   405		fmap_size = args.out_args[0].size;
   406		pr_notice("%s: nodei=%lld fmap_size=%ld\n", __func__, nodeid, fmap_size);
   407	
   408		return 0;
   409	}
   410	#endif
   411	

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