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a8ad3bf02c
There exists a lock inversion between the z_xattr_lock and the z_teardown_lock. Detect this case and return EBUSY so zfs_resume_fs() will mark the inode stale and it can be safely revalidated on next access. * process-1 zpl_xattr_get -> Takes zp->z_xattr_lock __zpl_xattr_get zfs_lookup -> Takes zsb->z_teardown_lock in ZFS_ENTER macro * process-2 zfs_ioc_recv -> Takes zsb->z_teardown_lock in zfs_suspend_fs() zfs_resume_fs zfs_rezget -> Takes zp->z_xattr_lock Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Chunwei Chen <david.chen@osnexus.com> Closes #3969 |
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