From fc8ff397b2a91590031ae08534de627f957005cb Mon Sep 17 00:00:00 2001 From: Amir Goldstein Date: Fri, 9 Feb 2024 17:03:55 +0200 Subject: fuse: prepare for opening file in passthrough mode In preparation for opening file in passthrough mode, store the fuse_open_out argument in ff->args to be passed into fuse_file_io_open() with the optional backing_id member. This will be used for setting up passthrough to backing file on open reply with FOPEN_PASSTHROUGH flag and a valid backing_id. Opening a file in passthrough mode may fail for several reasons, such as missing capability, conflicting open flags or inode in caching mode. Return EIO from fuse_file_io_open() in those cases. The combination of FOPEN_PASSTHROUGH and FOPEN_DIRECT_IO is allowed - it mean that read/write operations will go directly to the server, but mmap will be done to the backing file. Signed-off-by: Amir Goldstein Signed-off-by: Miklos Szeredi --- fs/fuse/fuse_i.h | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'fs/fuse/fuse_i.h') diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h index 4f1681650f57..40e94ef3d093 100644 --- a/fs/fuse/fuse_i.h +++ b/fs/fuse/fuse_i.h @@ -213,15 +213,15 @@ enum { struct fuse_conn; struct fuse_mount; -struct fuse_release_args; +union fuse_file_args; /** FUSE specific file data */ struct fuse_file { /** Fuse connection for this file */ struct fuse_mount *fm; - /* Argument space reserved for release */ - struct fuse_release_args *release_args; + /* Argument space reserved for open/release */ + union fuse_file_args *args; /** Kernel file handle guaranteed to be unique */ u64 kh; @@ -320,6 +320,19 @@ struct fuse_args_pages { unsigned int num_pages; }; +struct fuse_release_args { + struct fuse_args args; + struct fuse_release_in inarg; + struct inode *inode; +}; + +union fuse_file_args { + /* Used during open() */ + struct fuse_open_out open_outarg; + /* Used during release() */ + struct fuse_release_args release_args; +}; + #define FUSE_ARGS(args) struct fuse_args args = {} /** The request IO state (for asynchronous processing) */ -- cgit v1.2.3-73-gaa49b