tree 9d48df4f88e5f7b77ee9ee5143b0c5acd6851f93
parent a4139cd1bfd46d768f76b34b4ce13cb411401ade
author Seokhwan Kim <sukka.kim@samsung.com> 1628691728 +0900
committer Brett Wilson <brettw@google.com> 1628887572 +0000

[f2fs] Correct fs_lock and Use C++ locking primitives

This change uses shared locks for fs_lock instead of exclusive ones.
fs_lock is used to block file operations during cp, and thus threads
don't need to compete for the exclusive locks in normal io path.
It adds a new file-wide VnodeF2fs::io_lock_ that protects on-disk
file contents from simultaneous accesses. When pager is availabe,
page-wide locking can replace it. Vnode::mutex_ protects
vnode members.

BUG: 78140

Test: fx test f2fs-unittest f2fs-fs-tests f2fs-slow-fs-tests

Change-Id: I759fe0af08ec8b17970ca21fa7bc7b19417f4b53
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/f2fs/+/567605
Reviewed-by: Brett Wilson <brettw@google.com>