Re: [PATCH v8 6/9] nvmet: add copy command support for bdev and file ns

[kernel test robot]

Hi Anuj,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on axboe-block/for-next]
[also build test WARNING on linus/master v6.3-rc4 next-20230329]
[cannot apply to device-mapper-dm/for-next]
[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/Anuj-Gupta/block-Add-copy-offload-support-infrastructure/20230329-162018
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20230327084103.21601-7-anuj20.g%40samsung.com
patch subject: [PATCH v8 6/9] nvmet: add copy command support for bdev and file ns
config: arm64-randconfig-s041-20230329 (https://download.01.org/0day-ci/archive/20230330/202303300238.vmt9ne37-lkp@xxxxxxxxx/config)
compiler: aarch64-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/intel-lab-lkp/linux/commit/f846a8ac40882d9d42532e9e2b43560650ef8510
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Anuj-Gupta/block-Add-copy-offload-support-infrastructure/20230329-162018
        git checkout f846a8ac40882d9d42532e9e2b43560650ef8510
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash drivers/nvme/target/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303300238.vmt9ne37-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> drivers/nvme/target/admin-cmd.c:539:29: sparse: sparse: cast from restricted __le16

vim +539 drivers/nvme/target/admin-cmd.c

   490	
   491	static void nvmet_execute_identify_ns(struct nvmet_req *req)
   492	{
   493		struct nvme_id_ns *id;
   494		u16 status;
   495	
   496		if (le32_to_cpu(req->cmd->identify.nsid) == NVME_NSID_ALL) {
   497			req->error_loc = offsetof(struct nvme_identify, nsid);
   498			status = NVME_SC_INVALID_NS | NVME_SC_DNR;
   499			goto out;
   500		}
   501	
   502		id = kzalloc(sizeof(*id), GFP_KERNEL);
   503		if (!id) {
   504			status = NVME_SC_INTERNAL;
   505			goto out;
   506		}
   507	
   508		/* return an all zeroed buffer if we can't find an active namespace */
   509		status = nvmet_req_find_ns(req);
   510		if (status) {
   511			status = 0;
   512			goto done;
   513		}
   514	
   515		if (nvmet_ns_revalidate(req->ns)) {
   516			mutex_lock(&req->ns->subsys->lock);
   517			nvmet_ns_changed(req->ns->subsys, req->ns->nsid);
   518			mutex_unlock(&req->ns->subsys->lock);
   519		}
   520	
   521		/*
   522		 * nuse = ncap = nsze isn't always true, but we have no way to find
   523		 * that out from the underlying device.
   524		 */
   525		id->ncap = id->nsze =
   526			cpu_to_le64(req->ns->size >> req->ns->blksize_shift);
   527		switch (req->port->ana_state[req->ns->anagrpid]) {
   528		case NVME_ANA_INACCESSIBLE:
   529		case NVME_ANA_PERSISTENT_LOSS:
   530			break;
   531		default:
   532			id->nuse = id->nsze;
   533			break;
   534		}
   535	
   536		if (req->ns->bdev)
   537			nvmet_bdev_set_limits(req->ns->bdev, id);
   538		else {
 > 539			id->msrc = (u8)to0based(BIO_MAX_VECS - 1);
   540			id->mssrl = cpu_to_le16(BIO_MAX_VECS <<
   541					(PAGE_SHIFT - SECTOR_SHIFT));
   542			id->mcl = cpu_to_le32(le16_to_cpu(id->mssrl));
   543		}
   544	
   545		/*
   546		 * We just provide a single LBA format that matches what the
   547		 * underlying device reports.
   548		 */
   549		id->nlbaf = 0;
   550		id->flbas = 0;
   551	
   552		/*
   553		 * Our namespace might always be shared.  Not just with other
   554		 * controllers, but also with any other user of the block device.
   555		 */
   556		id->nmic = NVME_NS_NMIC_SHARED;
   557		id->anagrpid = cpu_to_le32(req->ns->anagrpid);
   558	
   559		memcpy(&id->nguid, &req->ns->nguid, sizeof(id->nguid));
   560	
   561		id->lbaf[0].ds = req->ns->blksize_shift;
   562	
   563		if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns)) {
   564			id->dpc = NVME_NS_DPC_PI_FIRST | NVME_NS_DPC_PI_LAST |
   565				  NVME_NS_DPC_PI_TYPE1 | NVME_NS_DPC_PI_TYPE2 |
   566				  NVME_NS_DPC_PI_TYPE3;
   567			id->mc = NVME_MC_EXTENDED_LBA;
   568			id->dps = req->ns->pi_type;
   569			id->flbas = NVME_NS_FLBAS_META_EXT;
   570			id->lbaf[0].ms = cpu_to_le16(req->ns->metadata_size);
   571		}
   572	
   573		if (req->ns->readonly)
   574			id->nsattr |= NVME_NS_ATTR_RO;
   575	done:
   576		if (!status)
   577			status = nvmet_copy_to_sgl(req, 0, id, sizeof(*id));
   578	
   579		kfree(id);
   580	out:
   581		nvmet_req_complete(req, status);
   582	}
   583	

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