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de198f2d95
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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| .. | ||
| badsend | ||
| btree_test | ||
| chg_usr_exec | ||
| devname2devid | ||
| dir_rd_update | ||
| draid | ||
| file_check | ||
| file_trunc | ||
| file_write | ||
| get_diff | ||
| largest_file | ||
| libzfs_input_check | ||
| mkbusy | ||
| mkfile | ||
| mkfiles | ||
| mktree | ||
| mmap_exec | ||
| mmap_libaio | ||
| mmap_seek | ||
| mmapwrite | ||
| nvlist_to_lua | ||
| randfree_file | ||
| randwritecomp | ||
| readmmap | ||
| rename_dir | ||
| rm_lnkcnt_zero_file | ||
| send_doall | ||
| stride_dd | ||
| threadsappend | ||
| user_ns_exec | ||
| xattrtest | ||
| file_common.h | ||
| Makefile.am | ||