mirror_zfs

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Brian Behlendorf a8ad3bf02c Fix z_xattr_lock/z_teardown_lock lock inversion

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

2015-12-18 13:17:44 -08:00

avl

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

nvpair

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

unicode

Support parallel build trees (VPATH builds)

2015-07-17 13:42:51 -07:00

zcommon

Fix uio_prefaultpages for 0 length iovec