Re: [RFC PATCH 5/5] ceph: Activate BLOG logging

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

Hi Alex,

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

[auto build test ERROR on akpm-mm/mm-nonmm-unstable]
[also build test ERROR on tip/sched/core linus/master v6.18-rc2 next-20251024]
[cannot apply to ceph-client/testing ceph-client/for-linus]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Alex-Markuze/sched-fork-Wire-BLOG-contexts-into-task-lifecycle/20251024-164832
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-nonmm-unstable
patch link:    https://lore.kernel.org/r/20251024084259.2359693-6-amarkuze%40redhat.com
patch subject: [RFC PATCH 5/5] ceph: Activate BLOG logging
config: xtensa-randconfig-002-20251025 (https://download.01.org/0day-ci/archive/20251025/202510251256.eh8qnDln-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251025/202510251256.eh8qnDln-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/202510251256.eh8qnDln-lkp@intel.com/

All errors (new ones prefixed by >>):

   fs/ceph/file.c: In function 'ceph_splice_read':
>> fs/ceph/file.c:2268:9: error: implicit declaration of function 'bout'; did you mean 'dout'? [-Wimplicit-function-declaration]
    2268 |         bout("splice_read %p %llx.%llx %llu~%zu trying to get caps on %p\n",
         |         ^~~~
         |         dout
--
   fs/ceph/super.c: In function 'ceph_parse_new_source':
>> fs/ceph/super.c:280:17: error: implicit declaration of function 'bout'; did you mean 'dout'? [-Wimplicit-function-declaration]
     280 |                 bout("separator '=' missing in source");
         |                 ^~~~
         |                 dout


vim +2268 fs/ceph/file.c

  2251	
  2252	/*
  2253	 * Wrap filemap_splice_read with checks for cap bits on the inode.
  2254	 * Atomically grab references, so that those bits are not released
  2255	 * back to the MDS mid-read.
  2256	 */
  2257	static ssize_t ceph_splice_read(struct file *in, loff_t *ppos,
  2258					struct pipe_inode_info *pipe,
  2259					size_t len, unsigned int flags)
  2260	{
  2261		struct ceph_file_info *fi = in->private_data;
  2262		struct inode *inode = file_inode(in);
  2263		struct ceph_inode_info *ci = ceph_inode(inode);
  2264		ssize_t ret;
  2265		int want = 0, got = 0;
  2266		CEPH_DEFINE_RW_CONTEXT(rw_ctx, 0);
  2267	
> 2268		bout("splice_read %p %llx.%llx %llu~%zu trying to get caps on %p\n",
  2269		     inode, ceph_vinop(inode), *ppos, len, inode);
  2270	
  2271		if (ceph_inode_is_shutdown(inode))
  2272			return -ESTALE;
  2273	
  2274		if (ceph_has_inline_data(ci) ||
  2275		    (fi->flags & CEPH_F_SYNC))
  2276			return copy_splice_read(in, ppos, pipe, len, flags);
  2277	
  2278		ret = ceph_start_io_read(inode);
  2279		if (ret)
  2280			return ret;
  2281	
  2282		want = CEPH_CAP_FILE_CACHE;
  2283		if (fi->fmode & CEPH_FILE_MODE_LAZY)
  2284			want |= CEPH_CAP_FILE_LAZYIO;
  2285	
  2286		ret = ceph_get_caps(in, CEPH_CAP_FILE_RD, want, -1, &got);
  2287		if (ret < 0)
  2288			goto out_end;
  2289	
  2290		if ((got & (CEPH_CAP_FILE_CACHE | CEPH_CAP_FILE_LAZYIO)) == 0) {
  2291			bout("splice_read/sync %p %llx.%llx %llu~%zu got cap refs on %s\n",
  2292			     inode, ceph_vinop(inode), *ppos, len,
  2293			     ceph_cap_string(got));
  2294	
  2295			ceph_put_cap_refs(ci, got);
  2296			ceph_end_io_read(inode);
  2297			return copy_splice_read(in, ppos, pipe, len, flags);
  2298		}
  2299	
  2300		bout("splice_read %p %llx.%llx %llu~%zu got cap refs on %s\n",
  2301		     inode, ceph_vinop(inode), *ppos, len, ceph_cap_string(got));
  2302	
  2303		rw_ctx.caps = got;
  2304		ceph_add_rw_context(fi, &rw_ctx);
  2305		ret = filemap_splice_read(in, ppos, pipe, len, flags);
  2306		ceph_del_rw_context(fi, &rw_ctx);
  2307	
  2308		bout("splice_read %p %llx.%llx dropping cap refs on %s = %zd\n",
  2309		     inode, ceph_vinop(inode), ceph_cap_string(got), ret);
  2310	
  2311		ceph_put_cap_refs(ci, got);
  2312	out_end:
  2313		ceph_end_io_read(inode);
  2314		return ret;
  2315	}
  2316	

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