diff options
Diffstat (limited to 'lib/fuse_i.h')
| -rw-r--r-- | lib/fuse_i.h | 56 |
1 files changed, 54 insertions, 2 deletions
diff --git a/lib/fuse_i.h b/lib/fuse_i.h index d38b630..6930a20 100644 --- a/lib/fuse_i.h +++ b/lib/fuse_i.h @@ -87,6 +87,50 @@ struct fuse_module { int ctr; }; +/** + * Configuration parameters passed to fuse_session_loop_mt() and + * fuse_loop_mt(). + * + * Internal API to avoid exposing the plain data structure and + * causing compat issues after adding or removing struct members. + * + */ +#if FUSE_USE_VERSION >= FUSE_MAKE_VERSION(3, 12) +struct fuse_loop_config +{ + /* verififier that a correct struct was was passed. This is especially + * needed, as versions below (3, 12) were using a public struct + * (now called fuse_loop_config_v1), which was hard to extend with + * additional parameters, without risking that file system implementations + * would not have noticed and might either pass uninitialized members + * or even too small structs. + * fuse_loop_config_v1 has clone_fd at this offset, which should be either 0 + * or 1. v2 or even higher version just need to set a value here + * which not conflicting and very unlikely as having been set by + * file system implementation. + */ + int version_id; + + /** + * whether to use separate device fds for each thread + * (may increase performance) + */ + int clone_fd; + /** + * The maximum number of available worker threads before they + * start to get deleted when they become idle. If not + * specified, the default is 10. + * + * Adjusting this has performance implications; a very small number + * of threads in the pool will cause a lot of thread creation and + * deletion overhead and performance may suffer. When set to 0, a new + * thread will be created to service every operation. + * The special value of -1 means that this parameter is disabled. + */ + int max_idle_threads; +}; +#endif + /* ----------------------------------------------------------- * * Channel interface (when using -o clone_fd) * * ----------------------------------------------------------- */ @@ -128,8 +172,16 @@ void fuse_session_process_buf_int(struct fuse_session *se, struct fuse *fuse_new_31(struct fuse_args *args, const struct fuse_operations *op, size_t op_size, void *private_data); -int fuse_loop_mt_32(struct fuse *f, struct fuse_loop_config *config); -int fuse_session_loop_mt_32(struct fuse_session *se, struct fuse_loop_config *config); +int fuse_loop_mt_312(struct fuse *f, struct fuse_loop_config *config); +int fuse_session_loop_mt_312(struct fuse_session *se, struct fuse_loop_config *config); + +/** + * Internal verifier for the given config. + * + * @return negative standard error code or 0 on success + */ +int fuse_loop_cfg_verify(struct fuse_loop_config *config); + #define FUSE_MAX_MAX_PAGES 256 #define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32 |