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664d487a5d
When using lseek(2) to report data/holes memory mapped regions of the file were ignored. This could result in incorrect results. To handle this zfs_holey_common() was updated to asynchronously writeback any dirty mmap(2) regions prior to reporting holes. Additionally, while not strictly required, the dn_struct_rwlock is now held over the dirty check to prevent the dnode structure from changing. This ensures that a clean dnode can't be dirtied before the data/hole is located. The range lock is now also taken to ensure the call cannot race with zfs_write(). Furthermore, the code was refactored to provide a dnode_is_dirty() helper function which checks the dnode for any dirty records to determine its dirtiness. Reviewed-by: Matthew Ahrens <mahrens@delphix.com> Reviewed-by: Tony Hutter <hutter2@llnl.gov> Reviewed-by: Rich Ercolani <rincebrain@gmail.com> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Issue #11900 Closes #12724 |
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| .. | ||
| Makefile.am | ||
| policy.h | ||
| sha2.h | ||
| trace_acl.h | ||
| trace_arc.h | ||
| trace_common.h | ||
| trace_dbgmsg.h | ||
| trace_dbuf.h | ||
| trace_dmu.h | ||
| trace_dnode.h | ||
| trace_multilist.h | ||
| trace_rrwlock.h | ||
| trace_txg.h | ||
| trace_vdev.h | ||
| trace_zfs.h | ||
| trace_zil.h | ||
| trace_zio.h | ||
| trace_zrlock.h | ||
| zfs_bootenv_os.h | ||
| zfs_context_os.h | ||
| zfs_ctldir.h | ||
| zfs_dir.h | ||
| zfs_vfsops_os.h | ||
| zfs_vnops_os.h | ||
| zfs_znode_impl.h | ||
| zpl.h | ||