From: Hao Xu <howeyxu@xxxxxxxxxxx>
Patch 1 is a fix for private mmap in FOPEN_DIRECT_IO mode
This is added here together since the later two depends on it.
Patch 2 is the main dish
Patch 3 is to maintain direct io logic for shared mmap in FOPEN_DIRECT_IO mode
v3 -> v4
fix race condition for buffered write and direct read by flushing
pages before direct read to avoid to get stale data
v2 -> v3
add patch 1 fix here, and adjust it follow Bernd's comment
add patch 3 which does right thing for shared mmap in FOPEN_DIRECT_IO mode
v1 -> v2:
make the new flag a fuse init one rather than a open flag since it's
not common that different files in a filesystem has different
strategy of shared mmap.
Hao Xu (3):
fuse: invalidate page cache pages before direct write
fuse: add a new fuse init flag to relax restrictions in no cache mode
fuse: write back dirty pages before direct write in direct_io_relax
mode
fs/fuse/file.c | 26 +++++++++++++++++++++++---
fs/fuse/fuse_i.h | 3 +++
fs/fuse/inode.c | 5 ++++-
include/uapi/linux/fuse.h | 4 ++++
4 files changed, 34 insertions(+), 4 deletions(-)
base-commit: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4
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2.25.1
