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| author | Bernd Schubert <bschubert@ddn.com> | 2023-12-04 15:58:45 +0100 |
|---|---|---|
| committer | Nikolaus Rath <Nikolaus@rath.org> | 2024-01-10 20:59:03 +0000 |
| commit | 22741f5582ea003c3518aff76e8df6561403f88b (patch) | |
| tree | 970e1748d6f893c8fd465a6692c68acfade28de9 /include/fuse_common.h | |
| parent | 0392acbb2340066171d372b483f059941095c7f9 (diff) | |
| download | libfuse-22741f5582ea003c3518aff76e8df6561403f88b.tar.gz | |
Add FUSE_CAP_DIRECT_IO_ALLOW_MMAP and use in passthrough_hp
This is not called FUSE_CAP_DIRECT_IO_RELAX, as the kernel flag
FUSE_DIRECT_IO_RELAX is supposed to be renamed to
FUSE_DIRECT_IO_ALLOW_MMAP. The corresponding kernel patches just
did not land yet.
Diffstat (limited to 'include/fuse_common.h')
| -rw-r--r-- | include/fuse_common.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/fuse_common.h b/include/fuse_common.h index 3ff14ec..a804134 100644 --- a/include/fuse_common.h +++ b/include/fuse_common.h @@ -441,6 +441,15 @@ struct fuse_loop_config_v1 { #define FUSE_CAP_SETXATTR_EXT (1 << 27) /** + * Files opened with FUSE_DIRECT_IO do not support MAP_SHARED mmap. This restriction + * is relaxed through FUSE_CAP_DIRECT_IO_RELAX (kernel flag: FUSE_DIRECT_IO_RELAX). + * MAP_SHARED is disabled by default for FUSE_DIRECT_IO, as this flag can be used to + * ensure coherency between mount points (or network clients) and with kernel page + * cache as enforced by mmap that cannot be guaranteed anymore. + */ +#define FUSE_CAP_DIRECT_IO_ALLOW_MMAP (1 << 27) + +/** * Ioctl flags * * FUSE_IOCTL_COMPAT: 32bit compat ioctl on 64bit machine |