mirror_zfs/module
Robert Evans 102b468b5e
Fix corruption caused by mmap flushing problems
1) Make mmap flushes synchronous. Linux may skip flushing dirty pages
   already in writeback unless data-integrity sync is requested.

2) Change zfs_putpage to use TXG_WAIT. Otherwise dirty pages may be
   skipped due to DMU pushing back on TX assign.

3) Add missing mmap flush when doing block cloning.

4) While here, pass errors from putpage to writepage/writepages.

This change fixes corruption edge cases, but unfortunately adds
synchronous ZIL flushes for dirty mmap pages to llseek and bclone
operations. It may be possible to avoid these sync writes later
but would need more tricky refactoring of the writeback code.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Robert Evans <evansr@google.com>
Closes #15933 
Closes #16019
2024-03-25 14:56:49 -07:00
..
avl Suppress Clang Static Analyzer false positive in the AVL tree code. 2023-03-08 13:51:21 -08:00
icp module/icp/asm-arm/sha2: enable non-SIMD asm kernels on armv5/6 2023-12-05 12:01:09 -08:00
lua LUA: Backport CVE-2020-24370's patch 2024-02-07 11:53:05 -08:00
nvpair nvpair: Constify string functions 2023-03-14 15:25:50 -07:00
os Fix corruption caused by mmap flushing problems 2024-03-25 14:56:49 -07:00
unicode Illumos #15286: do_composition() needs sign awareness 2023-01-05 11:16:21 -08:00
zcommon Add slow disk diagnosis to ZED 2024-02-08 09:19:52 -08:00
zfs Fix corruption caused by mmap flushing problems 2024-03-25 14:56:49 -07:00
zstd Resolve WS-2021-0184 vulnerability in zstd 2023-02-02 15:12:51 -08:00
.gitignore FreeBSD: Ignore symlink to i386 includes 2022-08-02 16:34:23 -07:00
Kbuild.in ddt: lift dedup stats out to separate file 2024-02-15 11:45:05 -08:00
Makefile.bsd ddt: rework ops interface in terms of keys and values 2024-02-15 11:45:38 -08:00
Makefile.in check-zstd-symbols: also ignore __pfx_ symbols 2023-09-18 09:08:41 -07:00