diff options
| author | Dharmendra singh <dsingh@ddn.com> | 2022-04-08 10:18:27 +0000 |
|---|---|---|
| committer | Nikolaus Rath <Nikolaus@rath.org> | 2023-03-03 12:41:49 +0000 |
| commit | a5eb7f2a0117ab43119ef5724cf5f4f2f181804a (patch) | |
| tree | 778bba47c24bc4f95b0353910d7af48b5c09722d /include/fuse_common.h | |
| parent | 4f8aae77e6d5f27ce22a3b62f9d69f36f5a5774c (diff) | |
| download | libfuse-a5eb7f2a0117ab43119ef5724cf5f4f2f181804a.tar.gz | |
Enable parallel direct writes on the same file.
Right now fuse kernel serializes direct writes on the
same file. This serialization is good for such FUSE
implementations which rely on the inode lock to
avoid any data inconsistency issues but it hurts badly
such FUSE implementations which have their own mechanism
of dealing with cache/data integrity and can handle
parallel direct writes on the same file.
This patch allows parallel direct writes on the same file to be
enabled with the help of a flag FOPEN_PARALLEL_DIRECT_WRITES.
FUSE implementations which want to use this feature can
set this flag during fuse init. Default behaviour remains
same i.e no parallel direct writes on the same file.
Corresponding fuse kernel patch(Merged).
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.2&id=153524053bbb0d27bb2e0be36d1b46862e9ce74c
Diffstat (limited to 'include/fuse_common.h')
| -rw-r--r-- | include/fuse_common.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/include/fuse_common.h b/include/fuse_common.h index 06ee365..d2e7fbe 100644 --- a/include/fuse_common.h +++ b/include/fuse_common.h @@ -59,7 +59,7 @@ struct fuse_file_info { requests if write caching had been disabled. */ unsigned int writepage : 1; - /** Can be filled in by open, to use direct I/O on this file. */ + /** Can be filled in by open/create, to use direct I/O on this file. */ unsigned int direct_io : 1; /** Can be filled in by open and opendir. It signals the kernel that any @@ -68,6 +68,10 @@ struct fuse_file_info { the file/directory is closed. */ unsigned int keep_cache : 1; + /** Can be filled by open/create, to allow parallel direct writes on this + * file */ + unsigned int parallel_direct_writes : 1; + /** Indicates a flush operation. Set in flush operation, also maybe set in highlevel lock operation and lowlevel release operation. */ @@ -93,7 +97,7 @@ struct fuse_file_info { unsigned int noflush : 1; /** Padding. Reserved for future use*/ - unsigned int padding : 24; + unsigned int padding : 23; unsigned int padding2 : 32; /** File handle id. May be filled in by filesystem in create, |