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Bug #727

sysfs: cannot create duplicate filename '/devices/rbd/0'

Added by Wido den Hollander about 7 years ago. Updated about 7 years ago.

Status:
Rejected
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
01/19/2011
Due date:
% Done:

0%

Spent time:
Source:
Tags:
Backport:
Regression:
No
Severity:
3 - minor
Reviewed:
Affected Versions:
ceph-qa-suite:
Release:
Needs Doc:
No

Description

I just tried to load a RBD image with the RBD module in 2.6.37 (final), I added the device with:

echo "[2a00:f10:113:1:230:48ff:fe8d:a21e] name=admin,secret=AQCUozFNuPWFDRAAtkyjn1qva4Orff3fOetI0w== rbd alpha" > add

This went fine, but a /dev/rbd0 device did not appear.

/sys/bus/rbd/devices/0 is created, but is seems to be a bit weird:

root@noisy:/sys/bus/rbd/devices/0# ls
client_id  create_snap  current_snap  major  name  pool  power  refresh  rollback_snap  size  subsystem  uevent
root@noisy:/sys/bus/rbd/devices/0# cat name
Segmentation fault
root@noisy:/sys/bus/rbd/devices/0# cat pool
Segmentation fault
root@noisy:/sys/bus/rbd/devices/0#

I then tried to remove the device:

root@noisy:~# echo 0 > /sys/bus/rbd/remove 
-bash: echo: write error: No such file or directory
root@noisy:~# 

I then removed the "rbd" module and probed it again, my dmesg then displayed:

[28673.697880] ------------[ cut here ]------------
[28673.705055] WARNING: at /build/buildd/linux-lts-backport-natty-2.6.37/fs/sysfs/dir.c:451 sysfs_add_one+0xce/0x150()
[28673.712409] Hardware name: X7DVL
[28673.719736] sysfs: cannot create duplicate filename '/bus/rbd'
[28673.727200] Modules linked in: rbd(+) cryptd aes_x86_64 aes_generic libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci [last unloaded: rbd]
[28673.760424] Pid: 8568, comm: modprobe Tainted: G      D W   2.6.37-12-server #26~lucid1-Ubuntu
[28673.768936] Call Trace:
[28673.777509]  [<ffffffff8106446f>] warn_slowpath_common+0x7f/0xc0
[28673.786174]  [<ffffffff81064566>] warn_slowpath_fmt+0x46/0x50
[28673.794829]  [<ffffffff811d355e>] sysfs_add_one+0xce/0x150
[28673.803325]  [<ffffffff811d3661>] create_dir+0x81/0xd0
[28673.811549]  [<ffffffff811d372d>] sysfs_create_dir+0x7d/0xd0
[28673.819703]  [<ffffffff812d76b7>] kobject_add_internal+0xb7/0x200
[28673.827874]  [<ffffffff812d782f>] kset_register+0x2f/0x60
[28673.836012]  [<ffffffff813ac066>] bus_register+0x116/0x2a0
[28673.844148]  [<ffffffffa004e000>] ? init_module+0x0/0x1000 [rbd]
[28673.852296]  [<ffffffffa004e020>] init_module+0x20/0x1000 [rbd]
[28673.860427]  [<ffffffff81002053>] do_one_initcall+0x43/0x190
[28673.868290]  [<ffffffff810a2abb>] sys_init_module+0xfb/0x250
[28673.876025]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28673.883527] ---[ end trace b5ec29a370a26a7b ]---
[28673.890756] kobject_add_internal failed for rbd with -EEXIST, don't try to register things with the same name in the same directory.
[28673.898165] Pid: 8568, comm: modprobe Tainted: G      D W   2.6.37-12-server #26~lucid1-Ubuntu
[28673.905625] Call Trace:
[28673.913028]  [<ffffffff812d775d>] kobject_add_internal+0x15d/0x200
[28673.920472]  [<ffffffff812d782f>] kset_register+0x2f/0x60
[28673.927853]  [<ffffffff813ac066>] bus_register+0x116/0x2a0
[28673.935259]  [<ffffffffa004e000>] ? init_module+0x0/0x1000 [rbd]
[28673.942651]  [<ffffffffa004e020>] init_module+0x20/0x1000 [rbd]
[28673.949987]  [<ffffffff81002053>] do_one_initcall+0x43/0x190
[28673.957322]  [<ffffffff810a2abb>] sys_init_module+0xfb/0x250
[28673.964583]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b

Right now I'm stuck, removing the rbd module doesn't clean everything up, but probing it again doesn't work either.

Other messages I saw in my dmesg during this process:

[28327.041656] libceph: client4309 fsid 99e7bd81-4f90-1e65-defa-70a04f5454b0
[28327.041726] libceph: mon0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6789 session established
[28327.041740] ------------[ cut here ]------------
[28327.041750] WARNING: at /build/buildd/linux-lts-backport-natty-2.6.37/fs/sysfs/dir.c:451 sysfs_add_one+0xce/0x150()
[28327.041754] Hardware name: X7DVL
[28327.041757] sysfs: cannot create duplicate filename '/devices/rbd/0'
[28327.041759] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28327.041815] Pid: 8122, comm: bash Tainted: G        W   2.6.37-12-server #26~lucid1-Ubuntu
[28327.041818] Call Trace:
[28327.041829]  [<ffffffff8106446f>] warn_slowpath_common+0x7f/0xc0
[28327.041834]  [<ffffffff81064566>] warn_slowpath_fmt+0x46/0x50
[28327.041838]  [<ffffffff811d355e>] sysfs_add_one+0xce/0x150
[28327.041843]  [<ffffffff811d3661>] create_dir+0x81/0xd0
[28327.041847]  [<ffffffff811d372d>] sysfs_create_dir+0x7d/0xd0
[28327.041854]  [<ffffffff812d76b7>] kobject_add_internal+0xb7/0x200
[28327.041859]  [<ffffffff812d7918>] kobject_add_varg+0x38/0x60
[28327.041863]  [<ffffffff812d79f4>] kobject_add+0x44/0x70
[28327.041868]  [<ffffffff812d74da>] ? kobject_get+0x1a/0x30
[28327.041875]  [<ffffffff813a9a4b>] device_add+0xcb/0x4d0
[28327.041879]  [<ffffffff813a9e6e>] device_register+0x1e/0x30
[28327.041886]  [<ffffffffa03c3441>] rbd_bus_add_dev+0x71/0x130 [rbd]
[28327.041892]  [<ffffffffa03c5dcf>] rbd_add+0x2bf/0x4d0 [rbd]
[28327.041897]  [<ffffffff813aae07>] bus_attr_store+0x27/0x30
[28327.041901]  [<ffffffff811d1725>] sysfs_write_file+0xe5/0x170
[28327.041907]  [<ffffffff811629e8>] vfs_write+0xc8/0x190
[28327.041910]  [<ffffffff81163191>] sys_write+0x51/0x80
[28327.041917]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28327.041920] ---[ end trace b5ec29a370a26a75 ]---
[28327.041925] kobject_add_internal failed for 0 with -EEXIST, don't try to register things with the same name in the same directory.
[28327.042111] Pid: 8122, comm: bash Tainted: G        W   2.6.37-12-server #26~lucid1-Ubuntu
[28327.042114] Call Trace:
[28327.042118]  [<ffffffff812d775d>] kobject_add_internal+0x15d/0x200
[28327.042123]  [<ffffffff812d7918>] kobject_add_varg+0x38/0x60
[28327.042128]  [<ffffffff812d79f4>] kobject_add+0x44/0x70
[28327.042132]  [<ffffffff812d74da>] ? kobject_get+0x1a/0x30
[28327.042136]  [<ffffffff813a9a4b>] device_add+0xcb/0x4d0
[28327.042140]  [<ffffffff813a9e6e>] device_register+0x1e/0x30
[28327.042145]  [<ffffffffa03c3441>] rbd_bus_add_dev+0x71/0x130 [rbd]
[28327.042150]  [<ffffffffa03c5dcf>] rbd_add+0x2bf/0x4d0 [rbd]
[28327.042155]  [<ffffffff813aae07>] bus_attr_store+0x27/0x30
[28327.042159]  [<ffffffff811d1725>] sysfs_write_file+0xe5/0x170
[28327.042163]  [<ffffffff811629e8>] vfs_write+0xc8/0x190
[28327.042167]  [<ffffffff81163191>] sys_write+0x51/0x80
[28327.042172]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28526.321981] ------------[ cut here ]------------
[28526.321994] WARNING: at /build/buildd/linux-lts-backport-natty-2.6.37/fs/sysfs/file.c:355 sysfs_open_file+0x1c5/0x220()
[28526.321998] Hardware name: X7DVL
[28526.322000] missing sysfs attribute operations for kobject: (null)
[28526.322104] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28526.322161] Pid: 8494, comm: cat Tainted: G        W   2.6.37-12-server #26~lucid1-Ubuntu
[28526.322164] Call Trace:
[28526.322175]  [<ffffffff8106446f>] warn_slowpath_common+0x7f/0xc0
[28526.322180]  [<ffffffff81064566>] warn_slowpath_fmt+0x46/0x50
[28526.322185]  [<ffffffff811d24d5>] sysfs_open_file+0x1c5/0x220
[28526.322189]  [<ffffffff811d2310>] ? sysfs_open_file+0x0/0x220
[28526.322195]  [<ffffffff81160eb7>] __dentry_open+0xe7/0x330
[28526.322199]  [<ffffffff811d0e76>] ? sysfs_permission+0x56/0x70
[28526.322203]  [<ffffffff81161221>] nameidata_to_filp+0x61/0x70
[28526.322208]  [<ffffffff8116e888>] finish_open+0xe8/0x1d0
[28526.322213]  [<ffffffff811769ef>] ? dput+0x8f/0x160
[28526.322217]  [<ffffffff8116f906>] do_last+0x86/0x420
[28526.322221]  [<ffffffff81171a13>] do_filp_open+0x203/0x5f0
[28526.322228]  [<ffffffff8112fc39>] ? handle_mm_fault+0x1b9/0x420
[28526.322232]  [<ffffffff81135605>] ? mmap_region+0x255/0x5a0
[28526.322238]  [<ffffffff812ad220>] ? apparmor_inode_getattr+0x60/0x70
[28526.322243]  [<ffffffff8117d1fa>] ? alloc_fd+0x10a/0x150
[28526.322249]  [<ffffffff81160c79>] do_sys_open+0x69/0x150
[28526.322252]  [<ffffffff81160da0>] sys_open+0x20/0x30
[28526.322259]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28526.322262] ---[ end trace b5ec29a370a26a76 ]---
[28530.022010] general protection fault: 0000 [#1] SMP 
[28530.022108] last sysfs file: /sys/devices/rbd/0/name
[28530.022193] CPU 0 
[28530.022230] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28530.023509] 
[28530.023546] Pid: 8503, comm: cat Tainted: G        W   2.6.37-12-server #26~lucid1-Ubuntu X7DVL/X7DVL
[28530.023676] RIP: 0010:[<ffffffff811d23a8>]  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28530.023829] RSP: 0018:ffff8800aa347c48  EFLAGS: 00010202
[28530.023911] RAX: 3020202020203020 RBX: ffff88017b9e8900 RCX: ffff8800aa1a9054
[28530.024011] RDX: ffff8800aa1a9050 RSI: 0000000000000001 RDI: ffff8800aa1a9050
[28530.024111] RBP: ffff8800aa347c88 R08: 6462722f73656369 R09: 6462722f73656369
[28530.024211] R10: 00656d616e2f302f R11: 7665642f7379732f R12: ffff8800aa1a9050
[28530.024312] R13: ffffffff81ca90a8 R14: ffff8800aa238238 R15: ffff8800a1996460
[28530.024413] FS:  00007f83d41b9700(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
[28530.024535] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[28530.024615] CR2: 00007f83d3d6d1c0 CR3: 00000000aa1a4000 CR4: 00000000000006f0
[28530.024715] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28530.024816] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28530.024917] Process cat (pid: 8503, threadinfo ffff8800aa346000, task ffff880100adad80)
[28530.025035] Stack:
[28530.025072]  ffff8800a1996460 ffff8800a19a5240 0000000000000000 ffff88017b9e8900
[28530.025219]  ffff8801a1e2d700 ffff8800a19a5240 ffffffff811d2310 ffff8800a1996460
[28530.025367]  ffff8800aa347ce8 ffffffff81160eb7 ffff8800aa347cc8 ffffffff811d0e76
[28530.025514] Call Trace:
[28530.025557]  [<ffffffff811d2310>] ? sysfs_open_file+0x0/0x220
[28530.025640]  [<ffffffff81160eb7>] __dentry_open+0xe7/0x330
[28530.025729]  [<ffffffff811d0e76>] ? sysfs_permission+0x56/0x70
[28530.025816]  [<ffffffff81161221>] nameidata_to_filp+0x61/0x70
[28530.025898]  [<ffffffff8116e888>] finish_open+0xe8/0x1d0
[28530.025981]  [<ffffffff811769ef>] ? dput+0x8f/0x160
[28530.026063]  [<ffffffff8116f906>] do_last+0x86/0x420
[28530.026148]  [<ffffffff81171a13>] do_filp_open+0x203/0x5f0
[28530.026239]  [<ffffffff8112fc39>] ? handle_mm_fault+0x1b9/0x420
[28530.026329]  [<ffffffff81135605>] ? mmap_region+0x255/0x5a0
[28530.026423]  [<ffffffff812ad220>] ? apparmor_inode_getattr+0x60/0x70
[28530.026529]  [<ffffffff8117d1fa>] ? alloc_fd+0x10a/0x150
[28530.026613]  [<ffffffff81160c79>] do_sys_open+0x69/0x150
[28530.026695]  [<ffffffff81160da0>] sys_open+0x20/0x30
[28530.026783]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28530.026874] Code: c0 80 ca 81 e8 ea e5 10 00 4c 89 e7 e8 c2 01 00 00 48 89 c2 b8 ed ff ff ff 48 85 d2 74 3e 49 8b 46 28 48 85 c0 0f 84 10 01 00 00 <4c> 8b 68 08 4d 85 ed 0f 84 03 01 00 00 8b 43 3c a8 02 74 3b 41 
[28530.027658] RIP  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28530.027766]  RSP <ffff8800aa347c48>
[28530.052788] ---[ end trace b5ec29a370a26a77 ]---
[28559.202246] general protection fault: 0000 [#2] SMP 
[28559.202353] last sysfs file: /sys/devices/rbd/0/name
[28559.202439] CPU 0 
[28559.202480] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28559.203913] 
[28559.203953] Pid: 8513, comm: cat Tainted: G      D W   2.6.37-12-server #26~lucid1-Ubuntu X7DVL/X7DVL
[28559.204089] RIP: 0010:[<ffffffff811d23a8>]  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28559.210651] RSP: 0018:ffff8800aa661c48  EFLAGS: 00010202
[28559.210651] RAX: 3020202020203020 RBX: ffff88019efd4900 RCX: ffff8800aa1a9054
[28559.210651] RDX: ffff8800aa1a9050 RSI: 0000000000000002 RDI: ffff8800aa1a9050
[28559.210651] RBP: ffff8800aa661c88 R08: 6462722f73656369 R09: 6462722f73656369
[28559.210651] R10: 00656d616e2f302f R11: 7665642f7379732f R12: ffff8800aa1a9050
[28559.210651] R13: ffffffff81ca90a8 R14: ffff8800aa238238 R15: ffff8800a1996460
[28559.210651] FS:  00007f43a1398700(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
[28559.210651] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[28559.210651] CR2: 00007f43a0f4c1c0 CR3: 00000000aa7e6000 CR4: 00000000000006f0
[28559.210651] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28559.210651] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28559.210651] Process cat (pid: 8513, threadinfo ffff8800aa660000, task ffff880100adc440)
[28559.210651] Stack:
[28559.210651]  ffff8800a1996460 ffff8800a19a5240 0000000000000000 ffff88019efd4900
[28559.210651]  ffff8801a1e2d700 ffff8800a19a5240 ffffffff811d2310 ffff8800a1996460
[28559.210651]  ffff8800aa661ce8 ffffffff81160eb7 ffff8800aa661cc8 ffffffff811d0e76
[28559.210651] Call Trace:
[28559.210651]  [<ffffffff811d2310>] ? sysfs_open_file+0x0/0x220
[28559.210651]  [<ffffffff81160eb7>] __dentry_open+0xe7/0x330
[28559.210651]  [<ffffffff811d0e76>] ? sysfs_permission+0x56/0x70
[28559.210651]  [<ffffffff81161221>] nameidata_to_filp+0x61/0x70
[28559.210651]  [<ffffffff8116e888>] finish_open+0xe8/0x1d0
[28559.210651]  [<ffffffff811769ef>] ? dput+0x8f/0x160
[28559.210651]  [<ffffffff8116f906>] do_last+0x86/0x420
[28559.210651]  [<ffffffff81171a13>] do_filp_open+0x203/0x5f0
[28559.210651]  [<ffffffff8112fc39>] ? handle_mm_fault+0x1b9/0x420
[28559.210651]  [<ffffffff81135605>] ? mmap_region+0x255/0x5a0
[28559.210651]  [<ffffffff812ad220>] ? apparmor_inode_getattr+0x60/0x70
[28559.210651]  [<ffffffff8117d1fa>] ? alloc_fd+0x10a/0x150
[28559.210651]  [<ffffffff81160c79>] do_sys_open+0x69/0x150
[28559.210651]  [<ffffffff81160da0>] sys_open+0x20/0x30
[28559.210651]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28559.210651] Code: c0 80 ca 81 e8 ea e5 10 00 4c 89 e7 e8 c2 01 00 00 48 89 c2 b8 ed ff ff ff 48 85 d2 74 3e 49 8b 46 28 48 85 c0 0f 84 10 01 00 00 <4c> 8b 68 08 4d 85 ed 0f 84 03 01 00 00 8b 43 3c a8 02 74 3b 41 
[28559.210651] RIP  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28559.210651]  RSP <ffff8800aa661c48>
[28559.491748] ---[ end trace b5ec29a370a26a78 ]---
[28561.741981] general protection fault: 0000 [#3] SMP 
[28561.749259] last sysfs file: /sys/devices/rbd/0/pool
[28561.750498] CPU 0 
[28561.750498] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28561.750498] 
[28561.750498] Pid: 8519, comm: cat Tainted: G      D W   2.6.37-12-server #26~lucid1-Ubuntu X7DVL/X7DVL
[28561.750498] RIP: 0010:[<ffffffff811d23a8>]  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28561.750498] RSP: 0018:ffff8800aa661c48  EFLAGS: 00010206
[28561.750498] RAX: 3337333035352030 RBX: ffff8801a185b6c0 RCX: ffff8800aa1a90a4
[28561.750498] RDX: ffff8800aa1a90a0 RSI: 0000000000000001 RDI: ffff8800aa1a90a0
[28561.750498] RBP: ffff8800aa661c88 R08: 6462722f73656369 R09: 6462722f73656369
[28561.750498] R10: 006c6f6f702f302f R11: 7665642f7379732f R12: ffff8800aa1a90a0
[28561.750498] R13: ffffffff81ca90a8 R14: ffff8800aa238238 R15: ffff8800a19b13b0
[28561.750498] FS:  00007fd94dc5f700(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
[28561.750498] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[28561.750498] CR2: 00007fd94d8131c0 CR3: 00000000c52c8000 CR4: 00000000000006f0
[28561.750498] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28561.750498] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28561.750498] Process cat (pid: 8519, threadinfo ffff8800aa660000, task ffff880100adad80)
[28561.750498] Stack:
[28561.750498]  ffff8800a19b13b0 ffff8800a19a56c0 0000000000000000 ffff8801a185b6c0
[28561.750498]  ffff8801a1e2d700 ffff8800a19a56c0 ffffffff811d2310 ffff8800a19b13b0
[28561.750498]  ffff8800aa661ce8 ffffffff81160eb7 ffff8800aa661cc8 ffffffff811d0e76
[28561.750498] Call Trace:
[28561.750498]  [<ffffffff811d2310>] ? sysfs_open_file+0x0/0x220
[28561.750498]  [<ffffffff81160eb7>] __dentry_open+0xe7/0x330
[28561.750498]  [<ffffffff811d0e76>] ? sysfs_permission+0x56/0x70
[28561.750498]  [<ffffffff81161221>] nameidata_to_filp+0x61/0x70
[28561.750498]  [<ffffffff8116e888>] finish_open+0xe8/0x1d0
[28561.750498]  [<ffffffff811769ef>] ? dput+0x8f/0x160
[28561.750498]  [<ffffffff8116f906>] do_last+0x86/0x420
[28561.750498]  [<ffffffff81171a13>] do_filp_open+0x203/0x5f0
[28561.750498]  [<ffffffff8112fc39>] ? handle_mm_fault+0x1b9/0x420
[28561.750498]  [<ffffffff81135605>] ? mmap_region+0x255/0x5a0
[28561.750498]  [<ffffffff812ad220>] ? apparmor_inode_getattr+0x60/0x70
[28561.750498]  [<ffffffff8117d1fa>] ? alloc_fd+0x10a/0x150
[28561.750498]  [<ffffffff81160c79>] do_sys_open+0x69/0x150
[28561.750498]  [<ffffffff81160da0>] sys_open+0x20/0x30
[28561.750498]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28561.750498] Code: c0 80 ca 81 e8 ea e5 10 00 4c 89 e7 e8 c2 01 00 00 48 89 c2 b8 ed ff ff ff 48 85 d2 74 3e 49 8b 46 28 48 85 c0 0f 84 10 01 00 00 <4c> 8b 68 08 4d 85 ed 0f 84 03 01 00 00 8b 43 3c a8 02 74 3b 41 
[28561.750498] RIP  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28561.750498]  RSP <ffff8800aa661c48>
[28562.082785] ---[ end trace b5ec29a370a26a79 ]---
[28568.678430] general protection fault: 0000 [#4] SMP 
[28568.685576] last sysfs file: /sys/devices/rbd/0/name
[28568.687449] CPU 0 
[28568.687449] Modules linked in: cryptd aes_x86_64 aes_generic rbd libceph btrfs zlib_deflate libcrc32c ip6table_filter ip6_tables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm radeon ttm bridge drm_kms_helper i5000_edac drm stp edac_core ioatdma i5k_amb ppdev i2c_algo_bit ghes shpchp serio_raw dca parport_pc joydev hed lp parport usbhid hid e1000e ahci libahci
[28568.687449] 
[28568.687449] Pid: 8522, comm: cat Tainted: G      D W   2.6.37-12-server #26~lucid1-Ubuntu X7DVL/X7DVL
[28568.687449] RIP: 0010:[<ffffffff811d23a8>]  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28568.687449] RSP: 0018:ffff8800b2083c48  EFLAGS: 00010206
[28568.687449] RAX: 3337333035352030 RBX: ffff88017c3d2840 RCX: ffff8800aa1a9054
[28568.687449] RDX: ffff8800aa1a9050 RSI: 0000000000000003 RDI: ffff8800aa1a9050
[28568.687449] RBP: ffff8800b2083c88 R08: 6462722f73656369 R09: 6462722f73656369
[28568.687449] R10: 00656d616e2f302f R11: 7665642f7379732f R12: ffff8800aa1a9050
[28568.687449] R13: ffffffff81ca90a8 R14: ffff8800aa238238 R15: ffff8800a1996460
[28568.687449] FS:  00007ffff7fed700(0000) GS:ffff8800cfc00000(0000) knlGS:0000000000000000
[28568.687449] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[28568.687449] CR2: 00007ffff7ba21c0 CR3: 00000000aa0c8000 CR4: 00000000000006f0
[28568.687449] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[28568.687449] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[28568.838859] Process cat (pid: 8522, threadinfo ffff8800b2082000, task ffff8800aa25ad80)
[28568.838859] Stack:
[28568.838859]  ffff8800a1996460 ffff8800a19a5240 0000000000000000 ffff88017c3d2840
[28568.838859]  ffff8801a1e2d700 ffff8800a19a5240 ffffffff811d2310 ffff8800a1996460
[28568.838859]  ffff8800b2083ce8 ffffffff81160eb7 ffff8800b2083cc8 ffffffff811d0e76
[28568.838859] Call Trace:
[28568.838859]  [<ffffffff811d2310>] ? sysfs_open_file+0x0/0x220
[28568.838859]  [<ffffffff81160eb7>] __dentry_open+0xe7/0x330
[28568.838859]  [<ffffffff811d0e76>] ? sysfs_permission+0x56/0x70
[28568.838859]  [<ffffffff81161221>] nameidata_to_filp+0x61/0x70
[28568.838859]  [<ffffffff8116e888>] finish_open+0xe8/0x1d0
[28568.838859]  [<ffffffff811769ef>] ? dput+0x8f/0x160
[28568.838859]  [<ffffffff8116f906>] do_last+0x86/0x420
[28568.838859]  [<ffffffff81171a13>] do_filp_open+0x203/0x5f0
[28568.838859]  [<ffffffff8112fc39>] ? handle_mm_fault+0x1b9/0x420
[28568.838859]  [<ffffffff81135605>] ? mmap_region+0x255/0x5a0
[28568.838859]  [<ffffffff812ad220>] ? apparmor_inode_getattr+0x60/0x70
[28568.838859]  [<ffffffff8117d1fa>] ? alloc_fd+0x10a/0x150
[28568.838859]  [<ffffffff81160c79>] do_sys_open+0x69/0x150
[28568.838859]  [<ffffffff81160da0>] sys_open+0x20/0x30
[28568.838859]  [<ffffffff8100c102>] system_call_fastpath+0x16/0x1b
[28568.838859] Code: c0 80 ca 81 e8 ea e5 10 00 4c 89 e7 e8 c2 01 00 00 48 89 c2 b8 ed ff ff ff 48 85 d2 74 3e 49 8b 46 28 48 85 c0 0f 84 10 01 00 00 <4c> 8b 68 08 4d 85 ed 0f 84 03 01 00 00 8b 43 3c a8 02 74 3b 41 
[28568.838859] RIP  [<ffffffff811d23a8>] sysfs_open_file+0x98/0x220
[28568.838859]  RSP <ffff8800b2083c48>
[28569.017906] ---[ end trace b5ec29a370a26a7a ]---

This is on my 'noisy' machine, feel free to log in and check it out.

The kernel I'm running is from Ubuntu: 2.6.37-12-server

History

#1 Updated by Sage Weil about 7 years ago

  • Assignee set to Yehuda Sadeh

#2 Updated by Yehuda Sadeh about 7 years ago

This looks like #693. Would happen when first trying to add unexisting image (the sysfs cleanup was broken), and then trying to add actual image.

#3 Updated by Wido den Hollander about 7 years ago

I'm not sure, but it looks like it was a duplicate indeed.

I compiled the latest RBD driver (master branch: 9aae8faf48f074bac8fa2b5329fd38c362051a06) and tried again, see my command sequence:

root@noisy:~# dmesg 
[  488.257699] rbd: loaded rbd (rados block device)
root@noisy:~# rbd ls
alpha
root@noisy:~# echo "[2a00:f10:113:1:230:48ff:fe8d:a21e] name=admin,secret=AQCUozFNuPWFDRAAtkyjn1qva4Orff3fOetI0w== rbd alpha" > /sys/bus/rbd/add
-bash: echo: write error: No such file or directory
root@noisy:~# echo "[2a00:f10:113:1:230:48ff:fe8d:a21e] name=admin,secret=AQCUozFNuPWFDRAAtkyjn1qva4Orff3fOetI0w== rbd beta" > /sys/bus/rbd/add
-bash: echo: write error: No such file or directory
root@noisy:~# dmesg 
[  488.257699] rbd: loaded rbd (rados block device)
[  513.521675] libceph: client4607 fsid 99e7bd81-4f90-1e65-defa-70a04f5454b0
[  513.521739] libceph: mon0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6789 session established
[  560.051668] libceph: client4608 fsid 99e7bd81-4f90-1e65-defa-70a04f5454b0
[  560.051735] libceph: mon0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6789 session established
root@noisy:~# ceph -s
2011-01-20 15:03:34.301555    pg v30059: 8224 pgs: 8224 active+clean; 13029 MB data, 36152 MB used, 7408 GB / 7452 GB avail
2011-01-20 15:03:34.324540   mds e29: 1/1/1 up {0=up:active}
2011-01-20 15:03:34.324591   osd e771: 4 osds: 4 up, 4 in
2011-01-20 15:03:34.324664   log 2011-01-20 15:01:02.098520 mon0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6789/0 9 : [INF] mds0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6812/1973 up:active
2011-01-20 15:03:34.324786   class rbd (v1.3 [x86-64])
2011-01-20 15:03:34.324809   mon e1: 1 mons at {noisy=[2a00:f10:113:1:230:48ff:fe8d:a21e]:6789/0}
root@noisy:~# 

It seems that it can't detect the "alpha" image which is there.

Seems to me that the original problem is gone now, but somehow it fails to detect my images. This might be the same thing I had yesterday, "alpha" couldn't be found and then the bug of #693 came to light.

#4 Updated by Wido den Hollander about 7 years ago

I think there is something else wrong, my "alpha" image seems corrupted somehow:

My virtual machine "alpha" uses the RBD image "alpha" and won't start either:

root@noisy:~# virsh start alpha
error: Failed to start domain alpha
error: internal error process exited while connecting to monitor: char device redirected to /dev/pts/1
qemu-system-x86_64: -drive file=rbd:rbd/alpha,if=none,id=drive-virtio-disk0,boot=on,format=rbd,cache=writeback: error reading header from alpha
qemu: could not open disk image rbd:rbd/alpha: No such file or directory
root@noisy:~#

I then created "beta" and tried again:

root@noisy:~# rbd create beta --size 1572864
rbd image 'beta':
    size 1536 GB in 393216 objects
    order 22 (4096 KB objects)
adding rbd image to directory...
creating rbd image...
done.
root@noisy:~# modprobe rbd
root@noisy:~# echo "[2a00:f10:113:1:230:48ff:fe8d:a21e] name=admin,secret=AQCUozFNuPWFDRAAtkyjn1qva4Orff3fOetI0w== rbd beta" > /sys/bus/rbd/add
root@noisy:~# dmesg 
[ 1060.337618] rbd: loaded rbd (rados block device)
[ 1065.911592] libceph: client4611 fsid 99e7bd81-4f90-1e65-defa-70a04f5454b0
[ 1065.911665] libceph: mon0 [2a00:f10:113:1:230:48ff:fe8d:a21e]:6789 session established
[ 1065.913931]  rbd0: unknown partition table
[ 1065.914011] rbd: rbd0: added with size 0x18000000000
root@noisy:~#

I think "alpha" got corrupted when I encountered #715, but I can't be 100% sure of it.

#5 Updated by Yehuda Sadeh about 7 years ago

  • Status changed from New to Rejected

Yeah, probably a duplicate of #693, closing it (should be Rejected-Duplicate status but there isn't one yet).

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