Date: Thu, 13 Nov 2014 11:43:55 -0800 From: javocado <javocado@gmail.com> To: FreeBSD Filesystems <freebsd-fs@freebsd.org> Subject: ZFS + xattr -> panic loop Message-ID: <CAP1HOmTNcSrJzw6H777iJvcKG%2BeCv5L%2Bt0jcR7ccYX5eRXxhGg@mail.gmail.com>
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After running an rsync (upload) into my zfs filesystem using the --fake-super option (which stores permissions in extended attributes) the zfs filesystem has somehow become corrupt. When booting the system it panic's upon zfs startup: panic: solaris assert: VFS_ROOT(vfsp, LK_EXCLUSIVE, &vp) == 0, file: /usr/src/sys/modules/zfs/../../cddl/contrib/opensolaris/uts/common/fs/zfs/zfs_vfsops.c , line: 1170 cpuid = 12 KDB: stack backtrace: #0 0xffffffff8034b3ae at kdb_backtrace+0x5e #1 0xffffffff803185c7 at panic+0x187 #2 0xffffffff80ab8213 at zfs_mount+0x563 #3 0xffffffff803a2635 at vfs_donmount+0xdc5 #4 0xffffffff803a3133 at nmount+0x63 #5 0xffffffff80553284 at amd64_syscall+0x1f4 #6 0xffffffff8053bc2c at Xfast_syscall+0xfc I was able to boot the system by setting the filesystem: canmount=off However, I am still unable to mount it manually without causing a similar panic. So, setting the cause of the panic aside for the moment, I just want to get to the data. I'd like to think I can do that by turning off xattrs and mounting it read-only however: # zfs set xattr=off pool/data property 'xattr' not supported on FreeBSD: permission denied How can I turn that off? Second or alternately, if I want to just dump the filesystem out excluding the extended attributes, so that I have a clean, mountable data set, how would I do that? Thank you!
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