Hi, Recently I suffered from a badly corrupted btrfs filesystem.
I had several snapshots in /snap that I moved into / (using /bin/mv). After that, attempting to access the ls the snapshot resulted in the ls process hanging. There were syslog messages: Aug 7 20:56:42 i kernel: [ 111.882816] ------------[ cut here ]------------ Aug 7 20:56:42 i kernel: [ 111.882896] WARNING: at fs/btrfs/inode.c:2408 btrfs_orphan_cleanup+0x1bf/0x2c0 [btrfs]() Aug 7 20:56:42 i kernel: [ 111.882903] Hardware name: GA-MA790GP-DS4H Aug 7 20:56:42 i kernel: [ 111.882907] Modules linked in: fuse ipt_MASQUERADE xt_state nf_nat_h323 nf_conntrack_h323 nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_proto_gre nf_nat_tftp nf_conntrack_tftp nf_nat_sip nf_conntrack_sip nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 ppdev parport_pc lp parport bnep bluetooth k8temp it87 cpufreq_ondemand hwmon_vid powernow_k8 freq_table mperf arc4 rt73usb crc_itu_t rt2x00usb rt2x00lib mac80211 cfg80211 rfkill ftdi_sio snd_hda_codec_hdmi uvcvideo snd_hda_codec_realtek snd_hda_intel videodev snd_hda_codec snd_seq snd_usb_audio snd_hwdep snd_usbmidi_lib snd_rawmidi snd_seq_device media snd_pcm snd_timer snd soundcore v4l2_compat_ioctl32 sp5100_tco e100 snd_page_alloc i2c_piix4 k10temp edac_core edac_mce_amd r8169 shpchp mii serio_raw virtio_net kvm_amd kvm btrfs zlib_deflate libcrc32c pata_acpi ata_generic pata_atiixp wmi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last Aug 7 20:56:42 i kernel: unloaded: scsi_wait_scan] Aug 7 20:56:42 i kernel: [ 111.883125] Pid: 1552, comm: ls Not tainted 2.6.40-4.fc15.x86_64 #1 Aug 7 20:56:42 i kernel: [ 111.883135] Call Trace: Aug 7 20:56:42 i kernel: [ 111.883158] [<ffffffff81054c8e>] warn_slowpath_common+0x83/0x9b Aug 7 20:56:42 i kernel: [ 111.883182] [<ffffffff81054cc0>] warn_slowpath_null+0x1a/0x1c Aug 7 20:56:42 i kernel: [ 111.883246] [<ffffffffa016aa55>] btrfs_orphan_cleanup+0x1bf/0x2c0 [btrfs] Aug 7 20:56:42 i kernel: [ 111.883311] [<ffffffffa016aeac>] btrfs_lookup_dentry+0x356/0x38d [btrfs] Aug 7 20:56:42 i kernel: [ 111.883375] [<ffffffffa016aef6>] btrfs_lookup+0x13/0x2a [btrfs] Aug 7 20:56:42 i kernel: [ 111.883398] [<ffffffff8112f6ef>] d_alloc_and_lookup+0x45/0x6b Aug 7 20:56:42 i kernel: [ 111.883419] [<ffffffff81130aab>] walk_component+0x206/0x3a9 Aug 7 20:56:42 i kernel: [ 111.883439] [<ffffffff8113114e>] lookup_last+0x3b/0x3d Aug 7 20:56:42 i kernel: [ 111.883458] [<ffffffff811311d2>] path_lookupat+0x82/0x2af Aug 7 20:56:42 i kernel: [ 111.883480] [<ffffffff81041325>] ? should_resched+0xe/0x2d Aug 7 20:56:42 i kernel: [ 111.883503] [<ffffffff814b5abc>] ? _cond_resched+0xe/0x22 Aug 7 20:56:42 i kernel: [ 111.883524] [<ffffffff812401a1>] ? might_fault+0x21/0x23 Aug 7 20:56:42 i kernel: [ 111.883545] [<ffffffff8113cc96>] ? mntget+0x1c/0x22 Aug 7 20:56:42 i kernel: [ 111.883563] [<ffffffff81132256>] do_path_lookup+0x28/0x97 Aug 7 20:56:42 i kernel: [ 111.883581] [<ffffffff81132682>] user_path_at+0x59/0x96 Aug 7 20:56:42 i kernel: [ 111.883601] [<ffffffff8112feb2>] ? putname+0x34/0x36 Aug 7 20:56:42 i kernel: [ 111.883618] [<ffffffff81132690>] ? user_path_at+0x67/0x96 Aug 7 20:56:42 i kernel: [ 111.883639] [<ffffffff8112a659>] vfs_fstatat+0x44/0x6e Aug 7 20:56:42 i kernel: [ 111.883659] [<ffffffff8112a6a1>] vfs_lstat+0x1e/0x20 Aug 7 20:56:42 i kernel: [ 111.883677] [<ffffffff8112a7f0>] sys_newlstat+0x1a/0x33 Aug 7 20:56:42 i kernel: [ 111.883696] [<ffffffff8113df1d>] ? mntput+0x26/0x28 Aug 7 20:56:42 i kernel: [ 111.883713] [<ffffffff8112f5e8>] ? path_put+0x20/0x24 Aug 7 20:56:42 i kernel: [ 111.883732] [<ffffffff81141743>] ? sys_getxattr+0x57/0x66 Aug 7 20:56:42 i kernel: [ 111.883752] [<ffffffff814bd7c2>] system_call_fastpath+0x16/0x1b Aug 7 20:56:42 i kernel: [ 111.883769] ---[ end trace d134844123cba413 ]--- Aug 7 20:56:42 i kernel: [ 111.883803] ------------[ cut here ]------------ That was repeated a number of times, and then large volumes of apparent garbage in syslog: Aug 7 20:56:42 i kernel: [ 111.888566] [<ffffffffa016aex38d [3/0x2alookup+0x45compokup_lokupad_resnd_res ? mig? mntgath_looku user_ putnamser_pa] vfs vfs _] sysd>] ? path_puttr+0x57stem_call_fastpath+0x16/0x1b Aug 7 20:56:42 i kernel: [ 111.888737] ---[ end trace d134844123cba41c ]887pha4>[111dwae: P-D887es ipe ncon23 conptpprof_nf_nnf_ nfnf_trarc ck_tp contp i ptnatf_nonnk_i4 n_dev4 porpart bp both itreqnd vidnowfree mb c_t ma021ll d_hdecdeoa_csndl vhdadecseqb_adiodepsnd snseqa ssndr sdcompaoctsp500_0 sallc_pix40 tere e_a9 s seirto_nvm_md ib_efl32cacp radeo<4>omm: ls Tainted: G W Call mmon+0x83/0x9b Aug 7 20:56:42 i kernel: [ 11c Aug 7 20:56:42 i kernel: [ 111.888876] [<ffffffffa016aa55>fs] Aug 7 20:56:42 i kernel: [ 111.888889] [<ffffffffa016aeax38d [3/0x2alookup+0xcompokup_lokupad_resnd_re ? mig? mntgeath_lookup+ user_ putname+ser_pat] vfs vfs_l] sysd>] ? path_ptr+0x5stem_call_fastpath+0x16/0x1b Aug 7 20:56:42 i kernel: [ 111.888949] ---[ end trace d134844123cba41d ]-889pha4>[111dwae: P-D889es ipe ncon23 conptpprof_nf_nnf_ nfnf_trarc ck_tp contp iptnatf_nonnk_i4 n_dev4 porpart bp both itreqnd vidnowfree mb c_t ma021ll d_hdecdeoa_csndl vhdadecseqb_adiodepsnd snseqa ssndr sdcompaoctsp500_0 sallc_pix4 0tere e_a9 s seirto_nvm_md ib_efl32cacp radeo<4>omm: ls Tainted: G W Call Tmmon+0x83/0x9b Aug 7 20:56:42 i kernel: [ 111c I have a 480MB btrfs-image of the corrupted filesystem that I can upload somewhere if it is wanted. (I only have 1mbps upstream, so would take a while...) The corruption occurred while running Fedora kernel-3.0.0-3.fc16.x86_64, but attempting to access the filesystem with other kernel versions also resulted in ls hanging and syslog spew. Cheers, Ralph. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
