diff options
| author | Zhao Chen <winters.zc@antgroup.com> | 2024-01-09 17:24:43 +0800 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2024-03-06 09:56:35 +0100 |
| commit | 9e7f5296f475ba5ab887ae3e55b922e17e99752b (patch) | |
| tree | eb33e03ce83450e7168ab505a0437b1f2f19788a /include/uapi | |
| parent | 760eac73f9f69aa28fcb3050b4946c2dcc656d12 (diff) | |
| download | linux-9e7f5296f475ba5ab887ae3e55b922e17e99752b.tar.gz | |
fuse: Use the high bit of request ID for indicating resend requests
Some FUSE daemons want to know if the received request is a resend
request. The high bit of the fuse request ID is utilized for indicating
this, enabling the receiver to perform appropriate handling.
The init flag "FUSE_HAS_RESEND" is added to indicate this feature.
Signed-off-by: Zhao Chen <winters.zc@antgroup.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/fuse.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h index 659932eb35e17..d08b99d60f6fd 100644 --- a/include/uapi/linux/fuse.h +++ b/include/uapi/linux/fuse.h @@ -216,7 +216,7 @@ * - add max_stack_depth to fuse_init_out, add FUSE_PASSTHROUGH init flag * - add backing_id to fuse_open_out, add FOPEN_PASSTHROUGH open flag * - add FUSE_NO_EXPORT_SUPPORT init flag - * - add FUSE_NOTIFY_RESEND + * - add FUSE_NOTIFY_RESEND, add FUSE_HAS_RESEND init flag */ #ifndef _LINUX_FUSE_H @@ -419,6 +419,8 @@ struct fuse_file_lock { * FUSE_HAS_EXPIRE_ONLY: kernel supports expiry-only entry invalidation * FUSE_DIRECT_IO_ALLOW_MMAP: allow shared mmap in FOPEN_DIRECT_IO mode. * FUSE_NO_EXPORT_SUPPORT: explicitly disable export support + * FUSE_HAS_RESEND: kernel supports resending pending requests, and the high bit + * of the request ID indicates resend requests */ #define FUSE_ASYNC_READ (1 << 0) #define FUSE_POSIX_LOCKS (1 << 1) @@ -460,6 +462,7 @@ struct fuse_file_lock { #define FUSE_DIRECT_IO_ALLOW_MMAP (1ULL << 36) #define FUSE_PASSTHROUGH (1ULL << 37) #define FUSE_NO_EXPORT_SUPPORT (1ULL << 38) +#define FUSE_HAS_RESEND (1ULL << 39) /* Obsolete alias for FUSE_DIRECT_IO_ALLOW_MMAP */ #define FUSE_DIRECT_IO_RELAX FUSE_DIRECT_IO_ALLOW_MMAP @@ -973,6 +976,14 @@ struct fuse_fallocate_in { uint32_t padding; }; +/** + * FUSE request unique ID flag + * + * Indicates whether this is a resend request. The receiver should handle this + * request accordingly. + */ +#define FUSE_UNIQUE_RESEND (1ULL << 63) + struct fuse_in_header { uint32_t len; uint32_t opcode; |