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-rw-r--r--include/fuse_common.h10
1 files changed, 9 insertions, 1 deletions
diff --git a/include/fuse_common.h b/include/fuse_common.h
index d7adab0..b6613a8 100644
--- a/include/fuse_common.h
+++ b/include/fuse_common.h
@@ -181,7 +181,15 @@ struct fuse_file_info {
#define FUSE_CAP_WRITEBACK_CACHE (1 << 16)
/**
- * Indicates that the filesystem supports support zero-message opens.
+ * Indicates support for zero-message opens. If this flag is set in
+ * the `capable` field of the `fuse_conn_info` structure, then the
+ * filesystem may return `ENOSYS` from the open() handler to indicate
+ * success. Further attempts to open files will be handled in the
+ * kernel. (If this flag is not set, returning ENOSYS will be treated
+ * as an error and signaled to the caller).
+ *
+ * Setting (or unsetting) this flag in the `want` field has *no
+ * effect*.
*/
#define FUSE_CAP_NO_OPEN_SUPPORT (1 << 17)