Hi Steve Please drop this patch. I will find another solution.
The other patches in the series can be reviewed and applied. Long > -----Original Message----- > From: kbuild test robot <l...@intel.com> > Sent: Monday, May 7, 2018 11:36 PM > To: Long Li <lon...@linuxonhyperv.com> > Cc: kbuild-...@01.org; Steve French <sfre...@samba.org>; linux- > c...@vger.kernel.org; samba-techni...@lists.samba.org; linux- > ker...@vger.kernel.org; linux-r...@vger.kernel.org; Long Li > <lon...@microsoft.com> > Subject: Re: [PATCH 5/7] cifs: smbd: Protect memory registration using RCU > > Hi Long, > > Thank you for the patch! Perhaps something to improve: > > [auto build test WARNING on cifs/for-next] [also build test WARNING on > v4.17-rc4 next-20180507] [if your patch is applied to the wrong git tree, > please drop us a note to help improve the system] > > url: > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub > .com%2F0day-ci%2Flinux%2Fcommits%2FLong-Li%2Fcifs-smbd-Make-upper- > layer-decide-when-to-destroy-the-transport%2F20180508- > 110150&data=02%7C01%7Clongli%40microsoft.com%7C56045b01aeae4e53b1 > 9408d5b4ae0502%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C6366 > 13581873868980&sdata=a1Ds3qI7sRrLCE77Eoasifonm1rUQYi7rdUEnLnGOB4% > 3D&reserved=0 > base: git://git.samba.org/sfrench/cifs-2.6.git for-next > reproduce: > # apt-get install sparse > make ARCH=x86_64 allmodconfig > make C=1 CF=-D__CHECK_ENDIAN__ > > > sparse warnings: (new ones prefixed by >>) > > fs/cifs/smb2pdu.c:110:47: sparse: expression using sizeof(void) > fs/cifs/smb2pdu.c:681:26: sparse: expression using sizeof(void) > >> fs/cifs/smb2pdu.c:2613:17: sparse: incompatible types in comparison > >> expression (different address spaces) > fs/cifs/smb2pdu.c:2993:17: sparse: incompatible types in comparison > expression (different address spaces) > fs/cifs/smb2pdu.c:3251:23: sparse: expression using sizeof(void) > fs/cifs/smb2pdu.c:3251:23: sparse: expression using sizeof(void) > fs/cifs/smb2pdu.c:3252:23: sparse: expression using sizeof(void) > fs/cifs/smb2pdu.c:3713:17: sparse: expression using sizeof(void) > fs/cifs/smb2pdu.c:3713:17: sparse: expression using sizeof(void) > > vim +2613 fs/cifs/smb2pdu.c > > 2565 > 2566 /* > 2567 * To form a chain of read requests, any read requests after > the first > should > 2568 * have the end_of_chain boolean set to true. > 2569 */ > 2570 static int > 2571 smb2_new_read_req(void **buf, unsigned int *total_len, > 2572 struct cifs_io_parms *io_parms, struct cifs_readdata > *rdata, > 2573 unsigned int remaining_bytes, int request_type) > 2574 { > 2575 int rc = -EACCES; > 2576 struct smb2_read_plain_req *req = NULL; > 2577 struct smb2_sync_hdr *shdr; > 2578 struct TCP_Server_Info *server; > 2579 > 2580 rc = smb2_plain_req_init(SMB2_READ, io_parms->tcon, > (void > **) &req, > 2581 total_len); > 2582 if (rc) > 2583 return rc; > 2584 > 2585 server = io_parms->tcon->ses->server; > 2586 if (server == NULL) > 2587 return -ECONNABORTED; > 2588 > 2589 shdr = &req->sync_hdr; > 2590 shdr->ProcessId = cpu_to_le32(io_parms->pid); > 2591 > 2592 req->PersistentFileId = io_parms->persistent_fid; > 2593 req->VolatileFileId = io_parms->volatile_fid; > 2594 req->ReadChannelInfoOffset = 0; /* reserved */ > 2595 req->ReadChannelInfoLength = 0; /* reserved */ > 2596 req->Channel = 0; /* reserved */ > 2597 req->MinimumCount = 0; > 2598 req->Length = cpu_to_le32(io_parms->length); > 2599 req->Offset = cpu_to_le64(io_parms->offset); > 2600 #ifdef CONFIG_CIFS_SMB_DIRECT > 2601 /* > 2602 * If we want to do a RDMA write, fill in and append > 2603 * smbd_buffer_descriptor_v1 to the end of read request > 2604 */ > 2605 if (server->rdma && rdata && !server->sign && > 2606 rdata->bytes >= server->smbd_conn- > >rdma_readwrite_threshold) { > 2607 > 2608 struct smbd_buffer_descriptor_v1 *v1; > 2609 bool need_invalidate = > 2610 io_parms->tcon->ses->server->dialect == > SMB30_PROT_ID; > 2611 > 2612 rcu_read_lock(); > > 2613 rcu_dereference(server->smbd_conn); > 2614 rdata->mr = smbd_register_mr( > 2615 server->smbd_conn, rdata->pages, > 2616 rdata->nr_pages, rdata->tailsz, > 2617 true, need_invalidate); > 2618 rcu_read_unlock(); > 2619 if (!rdata->mr) > 2620 return -ENOBUFS; > 2621 > 2622 req->Channel = > SMB2_CHANNEL_RDMA_V1_INVALIDATE; > 2623 if (need_invalidate) > 2624 req->Channel = SMB2_CHANNEL_RDMA_V1; > 2625 req->ReadChannelInfoOffset = > 2626 cpu_to_le16(offsetof(struct > smb2_read_plain_req, Buffer)); > 2627 req->ReadChannelInfoLength = > 2628 cpu_to_le16(sizeof(struct > smbd_buffer_descriptor_v1)); > 2629 v1 = (struct smbd_buffer_descriptor_v1 *) &req- > >Buffer[0]; > 2630 v1->offset = cpu_to_le64(rdata->mr->mr->iova); > 2631 v1->token = cpu_to_le32(rdata->mr->mr->rkey); > 2632 v1->length = cpu_to_le32(rdata->mr->mr->length); > 2633 > 2634 *total_len += sizeof(*v1) - 1; > 2635 } > 2636 #endif > 2637 if (request_type & CHAINED_REQUEST) { > 2638 if (!(request_type & END_OF_CHAIN)) { > 2639 /* next 8-byte aligned request */ > 2640 *total_len = DIV_ROUND_UP(*total_len, > 8) * > 8; > 2641 shdr->NextCommand = > cpu_to_le32(*total_len); > 2642 } else /* END_OF_CHAIN */ > 2643 shdr->NextCommand = 0; > 2644 if (request_type & RELATED_REQUEST) { > 2645 shdr->Flags |= > SMB2_FLAGS_RELATED_OPERATIONS; > 2646 /* > 2647 * Related requests use info from > previous > read request > 2648 * in chain. > 2649 */ > 2650 shdr->SessionId = 0xFFFFFFFF; > 2651 shdr->TreeId = 0xFFFFFFFF; > 2652 req->PersistentFileId = 0xFFFFFFFF; > 2653 req->VolatileFileId = 0xFFFFFFFF; > 2654 } > 2655 } > 2656 if (remaining_bytes > io_parms->length) > 2657 req->RemainingBytes = > cpu_to_le32(remaining_bytes); > 2658 else > 2659 req->RemainingBytes = 0; > 2660 > 2661 *buf = req; > 2662 return rc; > 2663 } > 2664 > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.01 > .org%2Fpipermail%2Fkbuild- > all&data=02%7C01%7Clongli%40microsoft.com%7C56045b01aeae4e53b19408 > d5b4ae0502%7C72f988bf86f141af91ab2d7cd011db47%7C1%7C0%7C63661358 > 1873868980&sdata=y3BYFeKEayhIfrs6hodamCPCyz8n3YQdN1yX3yXKs80%3D > &reserved=0 Intel Corporation
