Files
mirror_zfs/module/zfs
Brian Behlendorf a524f8d6af Fix lseek(SEEK_DATA/SEEK_HOLE) mmap consistency
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
2021-11-12 16:31:55 -08:00
..
2021-11-12 15:24:36 -08:00
2020-08-20 10:30:06 -07:00
2019-07-26 10:54:14 -07:00
2020-07-29 16:35:33 -07:00
2020-07-29 16:35:33 -07:00
2019-06-19 09:48:12 -07:00
2020-08-17 15:25:37 -07:00
2019-12-03 09:51:44 -08:00
2020-06-18 12:21:25 -07:00
2020-11-11 11:03:24 -08:00
2020-08-20 10:30:06 -07:00
2020-06-18 12:20:38 -07:00
2021-11-12 15:24:36 -08:00
2020-09-09 10:25:59 -07:00
2020-06-18 12:21:25 -07:00
2021-09-22 15:19:08 -07:00
2020-06-18 12:21:25 -07:00
2017-10-11 16:54:48 -04:00
2020-06-18 12:21:25 -07:00
2019-06-19 09:48:12 -07:00
2020-07-29 16:35:33 -07:00
2020-07-29 16:35:33 -07:00
2021-11-12 16:31:55 -08:00
2020-06-18 12:21:25 -07:00
2020-06-18 12:21:25 -07:00
2020-06-18 12:21:25 -07:00
2021-11-12 16:31:55 -08:00
2019-09-02 17:56:41 -07:00
2021-11-12 15:24:36 -08:00
2019-10-09 10:36:03 -07:00
2021-11-12 15:24:36 -08:00
2021-11-12 15:24:36 -08:00
2020-09-09 10:25:59 -07:00
2021-11-12 16:31:55 -08:00
2020-07-29 16:35:33 -07:00
2020-06-18 12:21:25 -07:00
2019-09-02 17:56:41 -07:00
2020-10-16 12:55:56 -07:00
2020-06-18 12:20:38 -07:00
2021-11-12 16:31:55 -08:00
2021-11-12 15:24:36 -08:00
2021-11-12 16:31:55 -08:00
2020-06-18 12:20:38 -07:00
2021-11-12 15:24:36 -08:00
2020-06-18 12:21:25 -07:00
2020-06-18 12:21:18 -07:00
2020-09-09 10:21:16 -07:00