diff options
Diffstat (limited to 'include/fuse_common.h')
| -rw-r--r-- | include/fuse_common.h | 40 |
1 files changed, 36 insertions, 4 deletions
diff --git a/include/fuse_common.h b/include/fuse_common.h index 2c866c4..fbf16ba 100644 --- a/include/fuse_common.h +++ b/include/fuse_common.h @@ -540,6 +540,10 @@ struct fuse_loop_config_v1 { * Some of the elements are read-write, these can be changed to * indicate the value requested by the filesystem. The requested * value must usually be smaller than the indicated value. + * + * Note: The `capable` and `want` fields are limited to 32 bits for + * ABI compatibility. For full 64-bit capability support, use the + * `capable_ext` and `want_ext` fields instead. */ struct fuse_conn_info { /** @@ -578,6 +582,8 @@ struct fuse_conn_info { /** * Capability flags that the kernel supports (read-only) + * + * Deprecated left over for ABI compatibility, use capable_ext */ uint32_t capable; @@ -586,6 +592,10 @@ struct fuse_conn_info { * * libfuse attempts to initialize this field with * reasonable default values before calling the init() handler. + * + * Deprecated left over for ABI compatibility. + * Use want_ext with the helper functions + * fuse_set_feature_flag() / fuse_unset_feature_flag() */ uint32_t want; @@ -680,9 +690,25 @@ struct fuse_conn_info { uint32_t padding : 31; /** + * Extended capability flags that the kernel supports (read-only) + * This field provides full 64-bit capability support. + */ + uint64_t capable_ext; + + /** + * Extended capability flags that the filesystem wants to enable. + * This field provides full 64-bit capability support. + * + * Don't set this field directly, but use the helper functions + * fuse_set_feature_flag() / fuse_unset_feature_flag() + * + */ + uint64_t want_ext; + + /** * For future use. */ - uint32_t reserved[20]; + uint32_t reserved[16]; }; fuse_static_assert(sizeof(struct fuse_conn_info) == 128, "Size of struct fuse_conn_info must be 128 bytes"); @@ -1076,8 +1102,8 @@ void fuse_loop_cfg_convert(struct fuse_loop_config *config, static inline bool fuse_set_feature_flag(struct fuse_conn_info *conn, uint64_t flag) { - if (conn->capable & flag) { - conn->want |= flag; + if (conn->capable_ext & flag) { + conn->want_ext |= flag; return true; } return false; @@ -1086,7 +1112,13 @@ static inline bool fuse_set_feature_flag(struct fuse_conn_info *conn, static inline void fuse_unset_feature_flag(struct fuse_conn_info *conn, uint64_t flag) { - conn->want &= ~flag; + conn->want_ext &= ~flag; +} + +static inline bool fuse_get_feature_flag(struct fuse_conn_info *conn, + uint64_t flag) +{ + return conn->capable_ext & flag ? true : false; } /* ----------------------------------------------------------- * |