mckusick fd7780e6f7 In softdep_setup_inomapdep() we may have to allocate both inodedep ... and bmsafemap dependency structures in inodedep_lookup() and bmsafemap_lookup() respectively. The setup of these structures must be done while holding the soft-dependency mutex. If the inodedep is allocated first, it may be freed in the I/O completion callback when the mutex is released to allocate the bmsafemap. If the bmsafemap is allocated first, it may be freed in the I/O completion callback when the mutex is released to allocate the inodedep. To resolve this problem, bmsafemap_lookup has had a parameter added that allows a pre-malloc'ed bmsafemap to be passed in so that it does not need to release the mutex to create a new bmsafemap. The softdep_setup_inomapdep() routine pre-malloc's a bmsafemap dependency before acquiring the mutex and starting to build the inodedep with a call to inodedep_lookup(). The subsequent call to bmsafemap_lookup() is passed this pre-allocated bmsafemap entry so that it need not release the mutex if it needs to create a new one. Reported by: Peter Holm Tested by: Peter Holm MFC after: 1 week		2012-06-11 23:07:21 +00:00
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ffs	In softdep_setup_inomapdep() we may have to allocate both inodedep	2012-06-11 23:07:21 +00:00
ufs	Implement SEEK_HOLE/SEEK_DATA for UFS.	2012-05-26 05:29:53 +00:00