jun mod KVM Drivers & 9P support

[segator]

Hi guys, I'm trying to add KVM drivers to xpenology junmod.

I succesfull load some modules using the tutorial on this forum, lsmod show modules loaded.

virtio network is working but i am not able to have 9p work (9P is used to mount host folder to guest, better performance than NFS,CIFS etc, it's almost native performance)

Driver is loaded but when trying to mount I get  this error on the VM log

Command used

mount -t 9p -o trans=virtio,version=9p2000.L hostshare /tmp/host_files

[  144.451391] BUG: unable to handle kernel paging request at 00007f000183c9ec
[  144.452284] IP: [<ffffffffa0bbcb4c>] p9_fid_create+0x7c/0xe0 [9pnet]
[  144.452284] PGD 0
[  144.452284] Oops: 0000 [#1] SMP
[  144.452284] Modules linked in: 9p bridge stp aufs macvlan veth xt_conntrack xt_addrtype nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables ipt_MASQUERADE xt_REDIRECT xt_nat iptable_nat nf_nat_ipv4 nf_nat xt_recent xt_iprange xt_limit xt_state xt_tcpudp xt_multiport xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables cifs udf isofs loop iscsi_target_mod(O) target_core_ep(O) target_core_file(O) target_core_iblock(O) target_core_mod(O) syno_extent_pool(PO) rodsp_ep(O) hid_generic usbhid hid usblp bromolow_synobios(PO) 9pnet_virtio 9pnet virtio_balloon virtio_net button ax88179_178a usbnet tg3 r8169 cnic bnx2 vmxnet3 pcnet32 e1000 sfc netxen_nic qlge qlcnic qla3xxx pch_gbe ptp_pch sky2 skge jme ipg uio alx atl1c atl1e atl1 libphy mii btrfs synoacl_vfs(PO) zlib_deflate hfsplus md4 hmac bnx2x(O) libcrc32c mdio mlx5_core(O) mlx4_en(O) mlx4_core(O) mlx_compat(O) compat(O) r8168(O) tn40xx(O) i40e(O) ixgbe(O) be2net(O) igb(O) i2c_algo_bit e1000e(O) dca fuse vfat fat crc32c_intel aesni_intel glue_helper lrw gf128mul ablk_helper arc4 cryptd ecryptfs sha512_generic sha256_generic sha1_generic ecb aes_x86_64 authenc des_generic ansi_cprng cts md5 cbc cpufreq_conservative cpufreq_powersave cpufreq_performance cpufreq_ondemand mperf processor thermal_sys cpufreq_stats freq_table dm_snapshot crc_itu_t crc_ccitt quota_v2 quota_tree psnap p8022 llc sit tunnel4 ip_tunnel ipv6 zram(C) sg etxhci_hcd aacraid virtio_scsi virtio_blk virtio_pci virtio_mmio virtio_ring virtio mpt3sas mpt2sas(O) megaraid_sas ata_piix mptctl mptsas mptspi mptscsih mptbase scsi_transport_spi megaraid megaraid_mbox megaraid_mm vmw_pvscsi BusLogic usb_storage xhci_hcd uhci_hcd ohci_hcd ehci_pci ehci_hcd usbcore usb_common el000(O) [last unloaded: bromolow_synobios]
[  144.452284] CPU: 1 PID: 12863 Comm: mount Tainted: P         C O 3.10.102 #15152
[  144.452284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014
[  144.452284] task: ffff88007a8b1800 ti: ffff8800790d0000 task.ti: ffff8800790d0000
[  144.452284] RIP: 0010:[<ffffffffa0bbcb4c>]  [<ffffffffa0bbcb4c>] p9_fid_create+0x7c/0xe0 [9pnet]
[  144.452284] RSP: 0018:ffff8800790d3c48  EFLAGS: 00010246
[  144.452284] RAX: 00007f000183c9d0 RBX: ffff8800784bf640 RCX: 0000000000000000
[  144.452284] RDX: ffffffffa0bc533c RSI: ffffffffa0bc4060 RDI: ffff88007b55d000
[  144.452284] RBP: ffff88007b55d000 R08: ffff8800787cfb80 R09: ffff880076c4a640
[  144.452284] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88007b55d000
[  144.452284] R13: ffff880067b30c48 R14: ffff88007b62b500 R15: ffff88007bc51e40
[  144.452284] FS:  00007efc7192d7c0(0000) GS:ffff88007fc80000(0000) knlGS:0000000000000000
[  144.452284] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  144.452284] CR2: 00007f000183c9ec CR3: 000000007b6de000 CR4: 00000000000407e0
[  144.452284] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[  144.452284] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[  144.452284] Stack:
[  144.452284]  ffff880067b30c00 ffff8800790d3cb0 ffffffffa0bbed7d ffffffff8127138b
[  144.452284]  ffff8800790d3ce0 ffffffff7b7ca640 ffff880077260000 0000000000000000
[  144.452284]  ffff880067b30c00 0000000000000000 ffff880067b30c48 ffff88007b7ca640
[  144.452284] Call Trace:
[  144.452284]  [<ffffffffa0bbed7d>] ? p9_client_attach+0x17d/0x1a0 [9pnet]
[  144.452284]  [<ffffffff8127138b>] ? match_token+0x20b/0x220
[  144.452284]  [<ffffffffa0fc6556>] ? v9fs_session_init+0x206/0x6c0 [9p]
[  144.452284]  [<ffffffff810c8baf>] ? pcpu_alloc_area+0x14f/0x360
[  144.452284]  [<ffffffffa0fc12c6>] ? v9fs_mount+0x66/0x340 [9p]
[  144.452284]  [<ffffffff810f9bd1>] ? mount_fs+0x31/0x1b0
[  144.452284]  [<ffffffff8111899d>] ? vfs_kern_mount+0x5d/0xf0
[  144.452284]  [<ffffffff81119efc>] ? do_new_mount+0xac/0x2c0
[  144.452284]  [<ffffffff810296e8>] ? __do_page_fault+0x1b8/0x480
[  144.452284]  [<ffffffff81238c05>] ? apparmor_capable+0x15/0x140
[  144.452284]  [<ffffffff8111b230>] ? do_mount+0x3b0/0x990
[  144.452284]  [<ffffffff8111b8ab>] ? SyS_mount+0x9b/0x110
[  144.452284]  [<ffffffff814adf72>] ? system_call_fastpath+0x16/0x1b
[  144.452284] Code: 08 48 c7 43 10 00 00 00 00 48 89 ef 48 c7 43 18 00 00 00 00 c7 43 0c ff ff ff ff 65 48 8b 04 25 c0 a7 00 00 48 8b 80 80 03 00 00 <8b> 40 1c 48 89 2b 48 c7 43 28 00 00 00 00 89 43 24 e8 9e 09 8f
[  144.452284] RIP  [<ffffffffa0bbcb4c>] p9_fid_create+0x7c/0xe0 [9pnet]
[  144.452284]  RSP <ffff8800790d3c48>
[  144.452284] CR2: 00007f000183c9ec
[  144.519077] ---[ end trace 9905cd69f413eb3e ]---

Any idea what could be the problem?

 

Thank you

[wenlez]

it does seem the p9 pid is created.  But , where is the error??

[laris]

Hi @segator

 

Do you solve the problem and find the root cause?